Definition of er. Meaning of er. Synonyms of er

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Definition of er

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A clerical error
Clerical Cler"ic*al, a. [LL. clericalis. See Clerk.] 1. Of or pertaining to the clergy; suitable for the clergy. ``A clerical education.' --Burke. 2. Of or relating to a clerk or copyist, or to writing. ``Clerical work.' --E. Everett. A clerical error, an error made in copying or writing.
At erst
Erst Erst ([~e]rst), adv. [Orig. superlative of ere; AS. [=ae]rest. See Ere.] [Archaic] 1. First. --Chaucer. 2. Previously; before; formerly; heretofore. --Chaucer. Tityrus, with whose style he had erst disclaimed all ambition to match his pastoral pipe. --A. W. Ward. At erst, at first; at the beginning. Now at erst, at this present time. --Chaucer.
Azimuthal error
Azimuthal Az"i*muth`al, a. Of or pertaining to the azimuth; in a horizontal circle. Azimuthal error of a transit instrument, its deviation in azimuth from the plane of the meridian.
C erythrophthalmus
Cuckoo Cuck"oo (k??k"??), n. [OE. coccou, cukkow, F. coucou, prob. of imitative origin; cf. L. cuculus, Gr. ????, Skr. k?ki?a, G. kuckuk, D. koekoek.] (Zo["o]l.) A bird belonging to Cuculus, Coccyzus, and several allied genera, of many species. Note: The European cuckoo (Cuculus canorus) builds no nest of its own, but lays its eggs in the nests of other birds, to be hatched by them. The American yellow-billed cuckoo (Coccyzus Americanus) and the black-billed cuckoo (C. erythrophthalmus) build their own nests. Cuckoo bee (Zool.), a bee, parasitic in the larval stage in the nests of other bees, feeding either upon their food or larvae. They belong to the genera Nomada, Melecta, Epeolus, and others. Cuckoo clock, a clock so constructed that at the time for striking it gives forth sounds resembling the cry of the cuckoo. Cuckoo dove (Zo["o]l.), a long-tailed pigeon of the genus Macropygia. Many species inhabit the East Indies. Cuckoo fish (Zo["o]l.), the European red gurnard (Trigla cuculus). The name probably alludes to the sound that it utters. Cuckoo falcon (Zo["o]l.), any falcon of the genus Baza. The genus inhabits Africa and the East Indies. Cuckoo maid (Zo["o]l.), the wryneck; -- called also cuckoo mate. Cuckoo ray (Zo["o]l.), a British ray (Raia miraletus). Cuckoo spit, or Cuckoo spittle. (a) A frothy secretion found upon plants, exuded by the larvae of certain insects, for concealment; -- called also toad spittle and frog spit. (b) (Zo["o]l.) A small hemipterous insect, the larva of which, living on grass and the leaves of plants, exudes this secretion. The insects belong to Aphrophora, Helochara, and allied genera. Ground cuckoo, the chaparral cock.
Christian era
Christian Chris"tian, a. 1. Pertaining to Christ or his religion; as, Christian people. 3. Pertaining to the church; ecclesiastical; as, a Christian court. --Blackstone. 4. Characteristic of Christian people; civilized; kind; kindly; gentle; beneficent. The graceful tact; the Christian art. --Tennyson. Christian Commission. See under Commission. Christian court. Same as Ecclesiastical court. Christian era, the present era, commencing with the birth of Christ. It is supposed that owing to an error of a monk (Dionysius Exiguus, d. about 556) employed to calculate the era, its commencement was fixed three or four years too late, so that 1890 should be 1893 or 1894. Christian name, the name given in baptism, as distinct from the family name, or surname.
Ervum Ervilia
Ers Ers ([~e]rs), n. [F., fr. L. ervum a kind of pulse, bitter vetch.] (Bot.) The bitter vetch (Ervum Ervilia).
Ervum Ervilia
Bitter Bit"ter, a. [AS. biter; akin to Goth. baitrs, Icel. bitr, Dan., Sw., D., & G. bitter, OS. bittar, fr. root of E. bite. See Bite, v. t.] 1. Having a peculiar, acrid, biting taste, like that of wormwood or an infusion of hops; as, a bitter medicine; bitter as aloes. 2. Causing pain or smart; piercing; painful; sharp; severe; as, a bitter cold day. 3. Causing, or fitted to cause, pain or distress to the mind; calamitous; poignant. It is an evil thing and bitter, that thou hast forsaken the Lord thy God. --Jer. ii. 19. 4. Characterized by sharpness, severity, or cruelty; harsh; stern; virulent; as, bitter reproach. Husbands, love your wives, and be not bitter against them. --Col. iii. 19. 5. Mournful; sad; distressing; painful; pitiable. The Egyptians . . . made their lives bitter with hard bondage. --Ex. i. 14. Bitter apple, Bitter cucumber, Bitter gourd. (Bot.) See Colocynth. Bitter cress (Bot.), a plant of the genus Cardamine, esp. C. amara. Bitter earth (Min.), tale earth; calcined magnesia. Bitter principles (Chem.), a class of substances, extracted from vegetable products, having strong bitter taste but with no sharply defined chemical characteristics. Bitter salt, Epsom salts; magnesium sulphate. Bitter vetch (Bot.), a name given to two European leguminous herbs, Vicia Orobus and Ervum Ervilia. To the bitter end, to the last extremity, however calamitous. Syn: Acrid; sharp; harsh; pungent; stinging; cutting; severe; acrimonious.
Heeling error
Heel Heel (h[=e]l), v. i. [OE. helden to lean, incline, AS. heldan, hyldan; akin to Icel. halla, Dan. helde, Sw. h["a]lla to tilt, pour, and perh. to E. hill.] (Naut.) To lean or tip to one side, as a ship; as, the ship heels aport; the boat heeled over when the squall struck it. Heeling error (Naut.), a deviation of the compass caused by the heeling of an iron vessel to one side or the other.
Hypoxis erecta
Blazing star, Double star, Multiple star, Shooting star, etc. See under Blazing, Double, etc. Nebulous star (Astron.), a small well-defined circular nebula, having a bright nucleus at its center like a star. Star anise (Bot.), any plant of the genus Illicium; -- so called from its star-shaped capsules. Star apple (Bot.), a tropical American tree (Chrysophyllum Cainito), having a milky juice and oblong leaves with a silky-golden pubescence beneath. It bears an applelike fruit, the carpels of which present a starlike figure when cut across. The name is extended to the whole genus of about sixty species, and the natural order (Sapotace[ae]) to which it belongs is called the Star-apple family. Star conner, one who cons, or studies, the stars; an astronomer or an astrologer. --Gascoigne. Star coral (Zo["o]l.), any one of numerous species of stony corals belonging to Astr[ae]a, Orbicella, and allied genera, in which the calicles are round or polygonal and contain conspicuous radiating septa. Star cucumber. (Bot.) See under Cucumber. Star flower. (Bot.) (a) A plant of the genus Ornithogalum; star-of-Bethlehem. (b) See Starwort (b) . (c) An American plant of the genus Trientalis (Trientalis Americana). --Gray. Star fort (Fort.), a fort surrounded on the exterior with projecting angles; -- whence the name. Star gauge (Ordnance), a long rod, with adjustable points projecting radially at its end, for measuring the size of different parts of the bore of a gun. Star grass. (Bot.) (a) A small grasslike plant (Hypoxis erecta) having star-shaped yellow flowers. (b) The colicroot. See Colicroot. Star hyacinth (Bot.), a bulbous plant of the genus Scilla (S. autumnalis); -- called also star-headed hyacinth. Star jelly (Bot.), any one of several gelatinous plants (Nostoc commune, N. edule, etc.). See Nostoc. Star lizard. (Zo["o]l.) Same as Stellion. Star-of-Bethlehem (Bot.), a bulbous liliaceous plant (Ornithogalum umbellatum) having a small white starlike flower. Star-of-the-earth (Bot.), a plant of the genus Plantago (P. coronopus), growing upon the seashore. Star polygon (Geom.), a polygon whose sides cut each other so as to form a star-shaped figure. Stars and Stripes, a popular name for the flag of the United States, which consists of thirteen horizontal stripes, alternately red and white, and a union having, in a blue field, white stars to represent the several States, one for each. With the old flag, the true American flag, the Eagle, and the Stars and Stripes, waving over the chamber in which we sit. --D. Webster. Star showers. See Shooting star, under Shooting. Star thistle (Bot.), an annual composite plant (Centaurea solstitialis) having the involucre armed with radiating spines. Star wheel (Mach.), a star-shaped disk, used as a kind of ratchet wheel, in repeating watches and the feed motions of some machines. Star worm (Zo["o]l.), a gephyrean. Temporary star (Astron.), a star which appears suddenly, shines for a period, and then nearly or quite disappears. These stars are supposed by some astronometers to be variable stars of long and undetermined periods. Variable star (Astron.), a star whose brilliancy varies periodically, generally with regularity, but sometimes irregularly; -- called periodical star when its changes occur at fixed periods. Water star grass (Bot.), an aquatic plant (Schollera graminea) with small yellow starlike blossoms.
Index error
3. A table for facilitating reference to topics, names, and the like, in a book; -- usually alphabetical in arrangement, and printed at the end of the volume. 4. A prologue indicating what follows. [Obs.] --Shak. 5. (Anat.) The second digit, that next pollex, in the manus, or hand; the forefinger; index finger. 6. (Math.) The figure or letter which shows the power or root of a quantity; the exponent. [In this sense the plural is always indices.] Index error, the error in the reading of a mathematical instrument arising from the zero of the index not being in complete adjustment with that of the limb, or with its theoretically perfect position in the instrument; a correction to be applied to the instrument readings equal to the error of the zero adjustment. Index expurgatorius. [L.] See Index prohibitorius (below). Index finger. See Index, 5. Index glass, the mirror on the index of a quadrant, sextant, etc. Index hand, the pointer or hand of a clock, watch, or other registering machine; a hand that points to something. Index of a logarithm (Math.), the integral part of the logarithm, and always one less than the number of integral figures in the given number. It is also called the characteristic. Index of refraction, or Refractive index (Opt.), the number which expresses the ratio of the sine of the angle of incidence to the sine of the angle of refraction. Thus the index of refraction for sulphur is 2, because, when light passes out of air into sulphur, the sine of the angle of incidence is double the sine of the angle of refraction. Index plate, a graduated circular plate, or one with circular rows of holes differently spaced; used in machines for graduating circles, cutting gear teeth, etc. Index prohibitorius [L.], or Prohibitory index (R. C. Ch.), a catalogue of books which are forbidden by the church to be read; the index expurgatorius [L.], or expurgatory index, is a catalogue of books from which passages marked as against faith or morals must be removed before Catholics can read them. These catalogues are published with additions, from time to time, by the Congregation of the Index, composed of cardinals, theologians, etc., under the sanction of the pope. --Hook. Index rerum [L.], a tabulated and alphabetized notebook, for systematic preservation of items, quotations, etc.
Law of error
Error Er"ror, n. [OF. error, errur, F. erreur, L. error, fr. errare to err. See Err.] 1. A wandering; a roving or irregular course. [Obs.] The rest of his journey, his error by sea. --B. Jonson. 2. A wandering or deviation from the right course or standard; irregularity; mistake; inaccuracy; something made wrong or left wrong; as, an error in writing or in printing; a clerical error. 3. A departing or deviation from the truth; falsity; false notion; wrong opinion; mistake; misapprehension. H? judgment was often in error, though his candor remained unimpaired. --Bancroft. 4. A moral offense; violation of duty; a sin or transgression; iniquity; fault. --Ps. xix. 12. 5. (Math.) The difference between the approximate result and the true result; -- used particularly in the rule of double position. 6. (Mensuration) (a) The difference between an observed value and the true value of a quantity. (b) The difference between the observed value of a quantity and that which is taken or computed to be the true value; -- sometimes called residual error. 7. (Law.) A mistake in the proceedings of a court of record in matters of law or of fact. 8. (Baseball) A fault of a player of the side in the field which results in failure to put out a player on the other side, or gives him an unearned base. Law of error, or Law of frequency of error (Mensuration), the law which expresses the relation between the magnitude of an error and the frequency with which that error will be committed in making a large number of careful measurements of a quantity. Probable error. (Mensuration) See under Probable. Writ of error (Law), an original writ, which lies after judgment in an action at law, in a court of record, to correct some alleged error in the proceedings, or in the judgment of the court. --Bouvier. Burrill. Syn: Mistake; fault; blunder; failure; fallacy; delusion; hallucination; sin. See Blunder.
Law of frequency of error
Error Er"ror, n. [OF. error, errur, F. erreur, L. error, fr. errare to err. See Err.] 1. A wandering; a roving or irregular course. [Obs.] The rest of his journey, his error by sea. --B. Jonson. 2. A wandering or deviation from the right course or standard; irregularity; mistake; inaccuracy; something made wrong or left wrong; as, an error in writing or in printing; a clerical error. 3. A departing or deviation from the truth; falsity; false notion; wrong opinion; mistake; misapprehension. H? judgment was often in error, though his candor remained unimpaired. --Bancroft. 4. A moral offense; violation of duty; a sin or transgression; iniquity; fault. --Ps. xix. 12. 5. (Math.) The difference between the approximate result and the true result; -- used particularly in the rule of double position. 6. (Mensuration) (a) The difference between an observed value and the true value of a quantity. (b) The difference between the observed value of a quantity and that which is taken or computed to be the true value; -- sometimes called residual error. 7. (Law.) A mistake in the proceedings of a court of record in matters of law or of fact. 8. (Baseball) A fault of a player of the side in the field which results in failure to put out a player on the other side, or gives him an unearned base. Law of error, or Law of frequency of error (Mensuration), the law which expresses the relation between the magnitude of an error and the frequency with which that error will be committed in making a large number of careful measurements of a quantity. Probable error. (Mensuration) See under Probable. Writ of error (Law), an original writ, which lies after judgment in an action at law, in a court of record, to correct some alleged error in the proceedings, or in the judgment of the court. --Bouvier. Burrill. Syn: Mistake; fault; blunder; failure; fallacy; delusion; hallucination; sin. See Blunder.
Leuciscus erythrophthalmus
Rudd Rudd, n. [See Rud, n.] (Zo["o]l.) A fresh-water European fish of the Carp family (Leuciscus erythrophthalmus). It is about the size and shape of the roach, but it has the dorsal fin farther back, a stouter body, and red irises. Called also redeye, roud, finscale, and shallow. A blue variety is called azurine, or blue roach.
M erminea
Ermine Er"mine, n. [OF. ermine, F. hermine, prob. of German origin; cf. OHG. harmo, G. hermelin, akin to Lith. szarm?, szarmonys, weasel, cf. AS. hearma; but cf. also LL. armelinus, armellina, hermellina, and pellis Armenia, the fur of the Armenian rat, mus Armenius, the animal being found also in Armenia.] 1. (Zo["o]l.) A valuable fur-bearing animal of the genus Mustela (M. erminea), allied to the weasel; the stoat. It is found in the northern parts of Asia, Europe, and America. In summer it is brown, but in winter it becomes white, except the tip of the tail, which is always black. 2. The fur of the ermine, as prepared for ornamenting garments of royalty, etc., by having the tips of the tails, which are black, arranged at regular intervals throughout the white. 3. By metonymy, the office or functions of a judge, whose state robe, lined with ermine, is emblematical of purity and honor without stain. --Chatham. 4. (Her.) One of the furs. See Fur (Her.) Note: Ermine is represented by an argent field, tufted with black. Ermines is the reverse of ermine, being black, spotted or timbered with argent. Erminois is the same as ermine, except that or is substituted for argent. Ermine moth (Zo["o]l.), a white moth with black spots (esp. Yponomeuta padella of Europe); -- so called on account of the resemblance of its covering to the fur of the ermine; also applied to certain white bombycid moths of America.
Mean error
Mean Mean, a. [OE. mene, OF. meiien, F. moyen, fr. L. medianus that is in the middle, fr. medius; akin to E. mid. See Mid.] 1. Occupying a middle position; middle; being about midway between extremes. Being of middle age and a mean stature. --Sir. P. Sidney. 2. Intermediate in excellence of any kind. According to the fittest style of lofty, mean, or lowly. --Milton. 3. (Math.) Average; having an intermediate value between two extremes, or between the several successive values of a variable quantity during one cycle of variation; as, mean distance; mean motion; mean solar day. Mean distance (of a planet from the sun) (Astron.), the average of the distances throughout one revolution of the planet, equivalent to the semi-major axis of the orbit. Mean error (Math. Phys.), the average error of a number of observations found by taking the mean value of the positive and negative errors without regard to sign. Mean-square error, or Error of the mean square (Math. Phys.), the error the square of which is the mean of the squares of all the errors; -- called also, especially by European writers, mean error. Mean line. (Crystallog.) Same as Bisectrix. Mean noon, noon as determined by mean time. Mean proportional (between two numbers) (Math.), the square root of their product. Mean sun, a fictitious sun supposed to move uniformly in the equator so as to be on the meridian each day at mean noon. Mean time, time as measured by an equable motion, as of a perfect clock, or as reckoned on the supposition that all the days of the year are of a mean or uniform length, in contradistinction from apparent time, or that actually indicated by the sun, and from sidereal time, or that measured by the stars.
mean error
Mean Mean, a. [OE. mene, OF. meiien, F. moyen, fr. L. medianus that is in the middle, fr. medius; akin to E. mid. See Mid.] 1. Occupying a middle position; middle; being about midway between extremes. Being of middle age and a mean stature. --Sir. P. Sidney. 2. Intermediate in excellence of any kind. According to the fittest style of lofty, mean, or lowly. --Milton. 3. (Math.) Average; having an intermediate value between two extremes, or between the several successive values of a variable quantity during one cycle of variation; as, mean distance; mean motion; mean solar day. Mean distance (of a planet from the sun) (Astron.), the average of the distances throughout one revolution of the planet, equivalent to the semi-major axis of the orbit. Mean error (Math. Phys.), the average error of a number of observations found by taking the mean value of the positive and negative errors without regard to sign. Mean-square error, or Error of the mean square (Math. Phys.), the error the square of which is the mean of the squares of all the errors; -- called also, especially by European writers, mean error. Mean line. (Crystallog.) Same as Bisectrix. Mean noon, noon as determined by mean time. Mean proportional (between two numbers) (Math.), the square root of their product. Mean sun, a fictitious sun supposed to move uniformly in the equator so as to be on the meridian each day at mean noon. Mean time, time as measured by an equable motion, as of a perfect clock, or as reckoned on the supposition that all the days of the year are of a mean or uniform length, in contradistinction from apparent time, or that actually indicated by the sun, and from sidereal time, or that measured by the stars.
Mean-square error
Mean Mean, a. [OE. mene, OF. meiien, F. moyen, fr. L. medianus that is in the middle, fr. medius; akin to E. mid. See Mid.] 1. Occupying a middle position; middle; being about midway between extremes. Being of middle age and a mean stature. --Sir. P. Sidney. 2. Intermediate in excellence of any kind. According to the fittest style of lofty, mean, or lowly. --Milton. 3. (Math.) Average; having an intermediate value between two extremes, or between the several successive values of a variable quantity during one cycle of variation; as, mean distance; mean motion; mean solar day. Mean distance (of a planet from the sun) (Astron.), the average of the distances throughout one revolution of the planet, equivalent to the semi-major axis of the orbit. Mean error (Math. Phys.), the average error of a number of observations found by taking the mean value of the positive and negative errors without regard to sign. Mean-square error, or Error of the mean square (Math. Phys.), the error the square of which is the mean of the squares of all the errors; -- called also, especially by European writers, mean error. Mean line. (Crystallog.) Same as Bisectrix. Mean noon, noon as determined by mean time. Mean proportional (between two numbers) (Math.), the square root of their product. Mean sun, a fictitious sun supposed to move uniformly in the equator so as to be on the meridian each day at mean noon. Mean time, time as measured by an equable motion, as of a perfect clock, or as reckoned on the supposition that all the days of the year are of a mean or uniform length, in contradistinction from apparent time, or that actually indicated by the sun, and from sidereal time, or that measured by the stars.
Melanerpes erythrocephalus
Woodpecker Wood"peck`er, n. (Zo["o]l.) Any one of numerous species of scansorial birds belonging to Picus and many allied genera of the family Picid[ae]. Note: These birds have the tail feathers pointed and rigid at the tip to aid in climbing, and a strong chisellike bill with which they are able to drill holes in the bark and wood of trees in search of insect larv[ae] upon which most of the species feed. A few species feed partly upon the sap of trees (see Sap sucker, under Sap), others spend a portion of their time on the ground in search of ants and other insects. The most common European species are the greater spotted woodpecker (Dendrocopus major), the lesser spotted woodpecker (D. minor), and the green woodpecker, or yaffle (see Yaffle). The best-known American species are the pileated woodpecker (see under Pileated), the ivory-billed woodpecker (Campephilus principalis), which is one of the largest known species, the red-headed woodpecker, or red-head (Melanerpes erythrocephalus), the red-bellied woodpecker (M. Carolinus) (see Chab), the superciliary woodpecker (M. superciliaris), the hairy woodpecker (Dryobates villosus), the downy woodpecker (D. pubescens), the three-toed, woodpecker (Picoides Americanus), the golden-winged woodpecker (see Flicker), and the sap suckers. See also Carpintero. Woodpecker hornbill (Zo["o]l.), a black and white Asiatic hornbill (Buceros pica) which resembles a woodpecker in color.
Mohammedan Era
Mohammedan Era Mohammedan Era The era in use in Mohammedan countries. See Mohammedan year, below.
Murex erinaceus
Winkle Win"kle, n. [AS. wincle.] (Zo["o]l.) (a) Any periwinkle. --Holland. (b) Any one of various marine spiral gastropods, esp., in the United States, either of two species of Fulgar (F. canaliculata, and F. carica). Note: These are large mollusks which often destroy large numbers of oysters by drilling their shells and sucking their blood. Sting winkle, a European spinose marine shell (Murex erinaceus). See Illust. of Murex.
Now at erst
Erst Erst ([~e]rst), adv. [Orig. superlative of ere; AS. [=ae]rest. See Ere.] [Archaic] 1. First. --Chaucer. 2. Previously; before; formerly; heretofore. --Chaucer. Tityrus, with whose style he had erst disclaimed all ambition to match his pastoral pipe. --A. W. Ward. At erst, at first; at the beginning. Now at erst, at this present time. --Chaucer.
Or ere
Or Or, prep. & adv. [AS. ?r ere, before. [root]204. See Ere, prep. & adv.] Ere; before; sooner than. [Obs.] But natheless, while I have time and space, Or that I forther in this tale pace. --Chaucer. Or ever, Or ere. See under Ever, and Ere.
P erectus
--Haeckel. 2. A genus consisting of an primate (P. erectus) apparently intermediate between man and the existing anthropoid apes, known from bones of a single individual found in Java (hence called Java man) in 1891-92. These bones include a thigh bone of the human type, two molar teeth intermediate between those of man and the anthropoids, and the calvaria of the skull, indicating a brain capacity of about 900 cubic centimeters, and resembling in form that of the Neanderthal man. Also [pl. -thropi], an animal of this genus. -- Pith`e*can"thrope, n. -- Pith`e*can"thro*poid, a.
Pipilo erythrophthalmus
Chewink Che"wink, n. (Zo["o]l.) An american bird (Pipilo erythrophthalmus) of the Finch family, so called from its note; -- called also towhee bunting and ground robin.
Piranga erythromelas
Tanager Tan"a*ger, n. [NL. tanagra, probably fr. Brazilian tangara.] (Zo["o]l.) Any one of numerous species of bright-colored singing birds belonging to Tanagra, Piranga, and allied genera. The scarlet tanager (Piranga erythromelas) and the summer redbird (Piranga rubra) are common species of the United States.
Piscidia erythrina
Dogwood Dog"wood` (-w[oo^]d`), n. [So named from skewers (dags) being made of it. Dr. Prior. See Dag, and Dagger.] (Bot.) The Cornus, a genus of large shrubs or small trees, the wood of which is exceedingly hard, and serviceable for many purposes. Note: There are several species, one of which, Cornus mascula, called also cornelian cherry, bears a red acid berry. C. florida is the flowering dogwood, a small American tree with very showy blossoms. Dogwood tree. (a) The dogwood or Cornus. (b) A papilionaceous tree (Piscidia erythrina) growing in Jamaica. It has narcotic properties; -- called also Jamaica dogwood.
Probable error
3. Rendering probable; supporting, or giving ground for, belief, but not demonstrating; as, probable evidence; probable presumption. --Blackstone. Probable cause (Law), a reasonable ground of presumption that a charge is, or my be, well founded. Probable error (of an observation, or of the mean of a number), that within which, taken positively and negatively, there is an even chance that the real error shall lie. Thus, if 3[sec] is the probable error in a given case, the chances that the real error is greater than 3[sec] are equal to the chances that it is less. The probable error is computed from the observations made, and is used to express their degree of accuracy.
Probable error
Error Er"ror, n. [OF. error, errur, F. erreur, L. error, fr. errare to err. See Err.] 1. A wandering; a roving or irregular course. [Obs.] The rest of his journey, his error by sea. --B. Jonson. 2. A wandering or deviation from the right course or standard; irregularity; mistake; inaccuracy; something made wrong or left wrong; as, an error in writing or in printing; a clerical error. 3. A departing or deviation from the truth; falsity; false notion; wrong opinion; mistake; misapprehension. H? judgment was often in error, though his candor remained unimpaired. --Bancroft. 4. A moral offense; violation of duty; a sin or transgression; iniquity; fault. --Ps. xix. 12. 5. (Math.) The difference between the approximate result and the true result; -- used particularly in the rule of double position. 6. (Mensuration) (a) The difference between an observed value and the true value of a quantity. (b) The difference between the observed value of a quantity and that which is taken or computed to be the true value; -- sometimes called residual error. 7. (Law.) A mistake in the proceedings of a court of record in matters of law or of fact. 8. (Baseball) A fault of a player of the side in the field which results in failure to put out a player on the other side, or gives him an unearned base. Law of error, or Law of frequency of error (Mensuration), the law which expresses the relation between the magnitude of an error and the frequency with which that error will be committed in making a large number of careful measurements of a quantity. Probable error. (Mensuration) See under Probable. Writ of error (Law), an original writ, which lies after judgment in an action at law, in a court of record, to correct some alleged error in the proceedings, or in the judgment of the court. --Bouvier. Burrill. Syn: Mistake; fault; blunder; failure; fallacy; delusion; hallucination; sin. See Blunder.
Psittacus erithacus
Jako Jak"o (j[a^]k"[-o]), n. (Zo["o]l.) An African parrot (Psittacus erithacus), very commonly kept as a cage bird; -- called also gray parrot.
Psittacus erithacus
Gray Gray, a. [Compar. Grayer; superl. Grayest.] [OE. gray, grey, AS. gr[=ae]g, gr[=e]g; akin to D. graauw, OHG. gr[=a]o, G. grau, Dan. graa, Sw. gr[*a], Icel. gr[=a]r.] [Written also grey.] 1. White mixed with black, as the color of pepper and salt, or of ashes, or of hair whitened by age; sometimes, a dark mixed color; as, the soft gray eye of a dove. These gray and dun colors may be also produced by mixing whites and blacks. --Sir I. Newton. 2. Gray-haired; gray-headed; of a gray color; hoary. 3. Old; mature; as, gray experience. Ames. Gray antimony (Min.), stibnite. Gray buck (Zo["o]l.), the chickara. Gray cobalt (Min.), smaltite. Gray copper (Min.), tetrahedrite. Gray duck (Zo["o]l.), the gadwall; also applied to the female mallard. Gray falcon (Zo["o]l.) the peregrine falcon. Gray Friar. See Franciscan, and Friar. Gray hen (Zo["o]l.), the female of the blackcock or black grouse. See Heath grouse. Gray mill or millet (Bot.), a name of several plants of the genus Lithospermum; gromwell. Gray mullet (Zo["o]l.) any one of the numerous species of the genus Mugil, or family Mugilid[ae], found both in the Old World and America; as the European species (M. capito, and M. auratus), the American striped mullet (M. albula), and the white or silver mullet (M. Braziliensis). See Mullet. Gray owl (Zo["o]l.), the European tawny or brown owl (Syrnium aluco). The great gray owl (Ulula cinerea) inhabits arctic America. Gray parrot (Zo["o]l.), a parrot (Psittacus erithacus), very commonly domesticated, and noted for its aptness in learning to talk. Gray pike. (Zo["o]l.) See Sauger. Gray snapper (Zo["o]l.), a Florida fish; the sea lawyer. See Snapper. Gray snipe (Zo["o]l.), the dowitcher in winter plumage. Gray whale (Zo["o]l.), a rather large and swift California whale (Rhachianectes glaucus), formerly taken in large numbers in the bays; -- called also grayback, devilfish, and hardhead.

Meaning of er from wikipedia

- Look up er, Er, ER, -er, 'er, or er- in Wiktionary, the free dictionary. ER or Er may refer to: Er (biblical person), the eldest son of Judah in the biblical...
- ER is an American medical drama television series created by Michael Crichton that aired on NBC from September 19, 1994, to April 2, 2009, with a total...
- com.er, likely for commercial entities/businesses edu.er, likely for educational institutions gov.er, reserved for the Eritrean government mil.er, reserved...
- entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity...
- Look up -er in Wiktionary, the free dictionary. In English, the -er suffix can signify: an agent noun, e.g., "singer" a degree of comparison, e.g., "louder"...
- The endoplasmic reticulum (ER) is a part of a transportation system of the eukaryotic cell, and has many other important functions such as protein folding...
- ER is an American medical drama television series created by Michael Crichton that aired on NBC from September 19, 1994, to April 2, 2009. It was produced...
- Er (Р р; italics: Р р) is a letter of the Cyrillic script. It commonly represents the alveolar trill /r/, like the "rolled" sound in the Scottish pronunciation...
- ER = EPR is a conjecture in physics stating that two entangled particles (a so-called Einstein–Podolsky–Rosen or EPR pair) are connected by a wormhole...
- Qin Er Shi (230/222 – 207 BC), given name Ying Huhai, was the second emperor of the Chinese Qin dynasty, reigning from 210 to 207 BC. The son of Qin Shi...