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Bifilar micrometerBifilar Bi*fi"lar, a. [Pref. bi- + filar.]
Two-threaded; involving the use of two threads; as, bifilar
suspension; a bifilar balance.
Bifilar micrometer (often called a bifilar), an
instrument form measuring minute distances or angles by
means of two very minute threads (usually spider lines),
one of which, at least, is movable; -- more commonly
called a filar micrometer. Compound microscopeMicroscope Mi"cro*scope, n. [Micro- + -scope.]
An optical instrument, consisting of a lens, or combination
of lenses, for making an enlarged image of an object which is
too minute to be viewed by the naked eye.
Compound microscope, an instrument consisting of a
combination of lenses such that the image formed by the
lens or set of lenses nearest the object (called the
objective) is magnified by another lens called the ocular
or eyepiece.
Oxyhydrogen microscope, and Solar microscope. See under
Oxyhydrogen, and Solar.
Simple, or Single, microscope, a single convex lens used
to magnify objects placed in its focus. Compound microscopeCompound Com"pound, a. [OE. compouned, p. p. of compounen. See
Compound, v. t.]
Composed of two or more elements, ingredients, parts;
produced by the union of several ingredients, parts, or
things; composite; as, a compound word.
Compound substances are made up of two or more simple
substances. --I. Watts.
Compound addition, subtraction, multiplication,
division (Arith.), the addition, subtraction, etc., of
compound numbers.
Compound crystal (Crystallog.), a twin crystal, or one
seeming to be made up of two or more crystals combined
according to regular laws of composition.
Compound engine (Mech.), a form of steam engine in which
the steam that has been used in a high-pressure cylinder
is made to do further service in a larger low-pressure
cylinder, sometimes in several larger cylinders,
successively.
Compound ether. (Chem.) See under Ether.
Compound flower (Bot.), a flower head resembling a single
flower, but really composed of several florets inclosed in
a common calyxlike involucre, as the sunflower or
dandelion.
Compound fraction. (Math.) See Fraction.
Compound fracture. See Fracture.
Compound householder, a householder who compounds or
arranges with his landlord that his rates shall be
included in his rents. [Eng.]
Compound interest. See Interest.
Compound larceny. (Law) See Larceny.
Compound leaf (Bot.), a leaf having two or more separate
blades or leaflets on a common leafstalk.
Compound microscope. See Microscope.
Compound motion. See Motion.
Compound number (Math.), one constructed according to a
varying scale of denomination; as, 3 cwt., 1 qr., 5 lb.;
-- called also denominate number.
Compound pier (Arch.), a clustered column.
Compound quantity (Alg.), a quantity composed of two or
more simple quantities or terms, connected by the sign +
(plus) or - (minus). Thus, a + b - c, and bb - b, are
compound quantities.
Compound radical. (Chem.) See Radical.
Compound ratio (Math.), the product of two or more ratios;
thus ab:cd is a ratio compounded of the simple ratios a:c
and b:d.
Compound rest (Mech.), the tool carriage of an engine
lathe.
Compound screw (Mech.), a screw having on the same axis two
or more screws with different pitch (a differential
screw), or running in different directions (a right and
left screw).
Compound time (Mus.), that in which two or more simple
measures are combined in one; as, 6-8 time is the joining
of two measures of 3-8 time.
Compound word, a word composed of two or more words;
specifically, two or more words joined together by a
hyphen. Cypselus or Micropus apusSwift Swift, n.
1. The current of a stream. [R.] --Walton.
2. (Zo["o]l.) Any one of numerous species of small,
long-winged, insectivorous birds of the family
Micropodid[ae]. In form and habits the swifts resemble
swallows, but they are destitute of complex vocal muscles
and are not singing birds, but belong to a widely
different group allied to the humming birds.
Note: The common European swift (Cypselus, or Micropus,
apus) nests in church steeples and under the tiles of
roofs, and is noted for its rapid flight and shrill
screams. It is called also black martin, black
swift, hawk swallow, devil bird, swingdevil,
screech martin, and shreik owl. The common
American, or chimney, swift (Ch[ae]tura pelagica) has
sharp rigid tips to the tail feathers. It attaches its
nest to the inner walls of chimneys, and is called also
chimney swallow. The Australian swift (Ch[ae]tura
caudacuta) also has sharp naked tips to the tail
quills. The European Alpine swift (Cypselus melba) is
whitish beneath, with a white band across the breast.
The common Indian swift is Cypselus affinis. See also
Palm swift, under Palm, and Tree swift, under
Tree.
3. (Zo["o]l.) Any one of several species of lizards, as the
pine lizard.
4. (Zo["o]l.) The ghost moth. See under Ghost.
5. [Cf. Swivel.] A reel, or turning instrument, for winding
yarn, thread, etc.; -- used chiefly in the plural.
6. The main card cylinder of a flax-carding machine. Double image micrometerMicrometer Mi*crom"e*ter, n. [Micro- + -meter: cf. F.
microm[`e]tre.]
An instrument, used with a telescope or microscope, for
measuring minute distances, or the apparent diameters of
objects which subtend minute angles. The measurement given
directly is that of the image of the object formed at the
focus of the object glass.
Circular, or Ring, micrometer, a metallic ring fixed in
the focus of the object glass of a telescope, and used to
determine differences of right ascension and declination
between stars by observations of the times at which the
stars cross the inner or outer periphery of the ring.
Double image micrometer, a micrometer in which two images
of an object are formed in the field, usually by the two
halves of a bisected lens which are movable along their
line of section by a screw, and distances are determined
by the number of screw revolutions necessary to bring the
points to be measured into optical coincidence. When the
two images are formed by a bisected object glass, it is
called a divided-object-glass micrometer, and when the
instrument is large and equatorially mounted, it is known
as a heliometer.
Double refraction micrometer, a species of double image
micrometer, in which the two images are formed by the
double refraction of rock crystal.
Filar, or Bifilar, micrometer. See under Bifilar.
Micrometer caliper or gauge (Mech.), a caliper or gauge
with a micrometer screw, for measuring dimensions with
great accuracy.
Micrometer head, the head of a micrometer screw.
Micrometer microscope, a compound microscope combined with
a filar micrometer, used chiefly for reading and
subdividing the divisions of large astronomical and
geodetical instruments.
Micrometer screw, a screw with a graduated head used in
some forms of micrometers.
Position micrometer. See under Position.
Scale, or Linear, micrometer, a minute and very
delicately graduated scale of equal parts used in the
field of a telescope or microscope, for measuring
distances by direct comparison. Double refraction micrometerMicrometer Mi*crom"e*ter, n. [Micro- + -meter: cf. F.
microm[`e]tre.]
An instrument, used with a telescope or microscope, for
measuring minute distances, or the apparent diameters of
objects which subtend minute angles. The measurement given
directly is that of the image of the object formed at the
focus of the object glass.
Circular, or Ring, micrometer, a metallic ring fixed in
the focus of the object glass of a telescope, and used to
determine differences of right ascension and declination
between stars by observations of the times at which the
stars cross the inner or outer periphery of the ring.
Double image micrometer, a micrometer in which two images
of an object are formed in the field, usually by the two
halves of a bisected lens which are movable along their
line of section by a screw, and distances are determined
by the number of screw revolutions necessary to bring the
points to be measured into optical coincidence. When the
two images are formed by a bisected object glass, it is
called a divided-object-glass micrometer, and when the
instrument is large and equatorially mounted, it is known
as a heliometer.
Double refraction micrometer, a species of double image
micrometer, in which the two images are formed by the
double refraction of rock crystal.
Filar, or Bifilar, micrometer. See under Bifilar.
Micrometer caliper or gauge (Mech.), a caliper or gauge
with a micrometer screw, for measuring dimensions with
great accuracy.
Micrometer head, the head of a micrometer screw.
Micrometer microscope, a compound microscope combined with
a filar micrometer, used chiefly for reading and
subdividing the divisions of large astronomical and
geodetical instruments.
Micrometer screw, a screw with a graduated head used in
some forms of micrometers.
Position micrometer. See under Position.
Scale, or Linear, micrometer, a minute and very
delicately graduated scale of equal parts used in the
field of a telescope or microscope, for measuring
distances by direct comparison. filar micrometerBifilar Bi*fi"lar, a. [Pref. bi- + filar.]
Two-threaded; involving the use of two threads; as, bifilar
suspension; a bifilar balance.
Bifilar micrometer (often called a bifilar), an
instrument form measuring minute distances or angles by
means of two very minute threads (usually spider lines),
one of which, at least, is movable; -- more commonly
called a filar micrometer. Lucernal microscopeLucernal Lu*cer"nal, a. [L. lucerna a lamp.]
Of or pertaining to a lamp.
Lucernal microscope, a form of the microscope in which the
object is illuminated by means of a lamp, and its image is
thrown upon a plate of ground glass connected with the
instrument, or on a screen independent of it. Micro-
Micro- Mi"cro-, Micr- Mi"cr- . [Gr. mikro`s small.]
A combining form signifying:
(a) Small, little, trivial, slight; as, microcosm,
microscope.
(b) (Metric System, Elec., Mech., etc.) A millionth part of;
as, microfarad, microohm, micrometer.
Microampere
Microampere Mi`cro*am`p[`e]re", n. [Micr- + amp[`e]re.]
(Elec.)
One of the smaller measures of electrical currents; the
millionth part of one amp[`e]re.
Microanalysis
Microanalysis Mi`cro*a*nal"y*sis, n. [Micro- + analysis.]
Analysis of the structure of materials from careful
observation of photomicrographs.
MicrobacteriaMicrobacteria Mi`cro*bac*te"ri*a, n. pl. [NL. See Micro-,
and Bacterium.] (Biol.)
In the classification of Cohn, one of the four tribes of
Bacteria.
Note: In this classification bacteria are divided into four
tribes: 1. Spherobacteria, or spherical bacteria, as
the genus Micrococcus. 2. Microbacteria, or
bacteria in the form of short rods, including the genus
Bacterium. 3. Desmobacteria, or bacteria in
straight filaments, of which the genus Bacillus is a
type. 4. Spirobacteria, or bacteria in spiral
filaments, as the genus Vibrio. Microbarograph
Microbarograph Mi`cro*bar"o*graph, n. [Micro- + barograph.]
An instrument for recording minor fluctuations of atmospheric
pressure, as opposed to general barometric surges.
Microbe
Microbe Mi"crobe, Microbion Mi*cro"bi*on, n. [NL. microbion,
fr. Gr. ? little + ? life.] (Biol.)
A microscopic organism; -- particularly applied to bacteria
and especially to pathogenic forms; as, the microbe of fowl
cholera.
Microbian
Microbian Mi*cro"bi*an, a. (Biol.)
Of, pertaining to, or caused by, microbes; as, the microbian
theory; a microbian disease.
Microbic
Microbic Mi*crob"ic, a. (Biol.)
Of or pertaining to a microbe.
Microbicide
Microbicide Mi*crob"i*cide, n. [Microbe + L. caedere to kill.]
(Biol.)
Any agent detrimental to, or destructive of, the life of
microbes or bacterial organisms.
Microbion
Microbe Mi"crobe, Microbion Mi*cro"bi*on, n. [NL. microbion,
fr. Gr. ? little + ? life.] (Biol.)
A microscopic organism; -- particularly applied to bacteria
and especially to pathogenic forms; as, the microbe of fowl
cholera.
MicrocephalicMicrocephalic Mi`cro*ce*phal"ic, Microcephalous
Mi`cro*ceph"a*lous, a. [Micro- + cephalic, cephalous.] (Anat.)
Having a small head; having the cranial cavity small; --
opposed to megacephalic. MicrocephalousMicrocephalic Mi`cro*ce*phal"ic, Microcephalous
Mi`cro*ceph"a*lous, a. [Micro- + cephalic, cephalous.] (Anat.)
Having a small head; having the cranial cavity small; --
opposed to megacephalic. Microchaera albocoronataSnowcap Snow"cap`, n. (Zo["o]l.)
A very small humming bird (Microch[ae]ra albocoronata)
native of New Grenada.
Note: The feathers of the top of the head are white and
snining, the body blue black with a purple and bronzy
luster. The name is applied also to Microch[ae]ra
parvirostris of Central America, which is similar in
color. Microchaera parvirostrisSnowcap Snow"cap`, n. (Zo["o]l.)
A very small humming bird (Microch[ae]ra albocoronata)
native of New Grenada.
Note: The feathers of the top of the head are white and
snining, the body blue black with a purple and bronzy
luster. The name is applied also to Microch[ae]ra
parvirostris of Central America, which is similar in
color. Micro-chemical
Micro-chemical Mi`cro-chem"ic*al, a.
Of or pertaining to micro-chemistry; as, a micro-chemical
test.
Micro-chemistry
Micro-chemistry Mi`cro-chem"is*try, n. [Micro- + chemistry.]
The application of chemical tests to minute objects or
portions of matter, magnified by the use of the microscopy;
-- distinguished from macro-chemistry.
Microchronometer
Microchronometer Mi`cro*chro*nom"e*ter, n.
A chronoscope.
Microcline
Microcline Mi"cro*cline, n. [Micro- + Gr. ? to incline.]
(Min.)
A mineral of the feldspar group, like orthoclase or common
feldspar in composition, but triclinic in form.
Micrococcal
Micrococcal Mi`cro*coc"cal, a.
Of or pertaining to micrococci; caused by micrococci.
--Nature.
Meaning of Micro from wikipedia
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micro- in Wiktionary, the free dictionary.
Micro may
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