Definition of Onium. Meaning of Onium. Synonyms of Onium

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Definition of Onium

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A Ascalonium
Rocambole Roc"am*bole, n. [F.] [Written also rokambole.] (Bot.) A name of Allium Scorodoprasum and A. Ascalonium, two kinds of garlic, the latter of which is also called shallot.
Ammonium
Ammonium Am*mo"ni*um, n. [See Ammonia.] (Chem.) A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals.
Ammonium cyanate
Cyanate Cy"a*nate (s?"?-n?t), n. [Cf. F. cuanate. See Cyanic.] (Chem.) A salt of cyanic acid. Ammonium cyanate (Chem.), a remarkable white crystalline substance, NH4.O.CN, which passes, on standing, to the organic compound, urea, CO.(NH2)2.
ammonium purpurate
Murexide Mu*rex"ide, n. [L. murex the purple fish, purple.] (Chem.) A crystalline nitrogenous substance having a splendid dichroism, being green by reflected light and garnet-red by transmitted light. It was formerly used in dyeing calico, and was obtained in a large quantities from guano. Formerly called also ammonium purpurate.
antimonium
Stibonium Sti*bo"ni*um, n. (Chem.) The hypothetical radical SbH4, analogous to ammonium; -- called also antimonium.
Archegonium
Archegonium Ar`che*go"ni*um, n. [NL., fr. Gr. ? the first of a race.] (Bot.) The pistillidium or female organ in the higher cryptogamic plants, corresponding to the pistil in flowering plants.
Chelidonium majus
Chelidonic Chel`i*don"ic, a. [See Celandine.] (Chem.) Of, pertaining to, or derived from, the celandine. Chelidonic acid, a weak acid extracted from the celandine (Chelidonium majus), as a white crystalline substance.
chloride of ammonium
Ammoniac Am*mo"ni*ac, Ammoniacal Am`mo*ni"a*cal, a. Of or pertaining to ammonia, or possessing its properties; as, an ammoniac salt; ammoniacal gas. Ammoniacal engine, an engine in which the vapor of ammonia is used as the motive force. Sal ammoniac [L. sal ammoniacus], the salt usually called chloride of ammonium, and formerly muriate of ammonia.
Chloride of ammonium
Chloride Chlo"ride, n. (Chem.) A binary compound of chlorine with another element or radical; as, chloride of sodium (common salt). Chloride of ammonium, sal ammoniac. Chloride of lime, bleaching powder; a grayish white substance, CaOCl2, used in bleaching and disinfecting; -- called more properly calcium hypochlorite. See Hypochlorous acid, under Hypochlorous. Mercuric chloride, corrosive sublimate.
Conium
Conium Co*ni"um (? or ?), n. [NL., fr. Gr. ? hemlock.] 1. (Bot.) A genus of biennial, poisonous, white-flowered, umbelliferous plants, bearing ribbed fruit (``seeds') and decompound leaves.
Conium maculatum
Poison Poi"son, n. [F. poison, in Old French also, a potion, fr. L. potio a drink, draught, potion, a poisonous draught, fr. potare to drink. See Potable, and cf. Potion.] 1. Any agent which, when introduced into the animal organism, is capable of producing a morbid, noxious, or deadly effect upon it; as, morphine is a deadly poison; the poison of pestilential diseases. 2. That which taints or destroys moral purity or health; as, the poison of evil example; the poison of sin. Poison ash. (Bot.) (a) A tree of the genus Amyris (A. balsamifera) found in the West Indies, from the trunk of which a black liquor distills, supposed to have poisonous qualities. (b) The poison sumac (Rhus venenata). [U. S.] Poison dogwood (Bot.), poison sumac. Poison fang (Zo["o]l.), one of the superior maxillary teeth of some species of serpents, which, besides having the cavity for the pulp, is either perforated or grooved by a longitudinal canal, at the lower end of which the duct of the poison gland terminates. See Illust. under Fang. Poison gland (Biol.), a gland, in animals or plants, which secretes an acrid or venomous matter, that is conveyed along an organ capable of inflicting a wound. Poison hemlock (Bot.), a poisonous umbelliferous plant (Conium maculatum). See Hemlock. Poison ivy (Bot.), a poisonous climbing plant (Rhus Toxicodendron) of North America. It is common on stone walls and on the trunks of trees, and has trifoliate, rhombic-ovate, variously notched leaves. Many people are poisoned by it, if they touch the leaves. See Poison sumac. Called also poison oak, and mercury. Poison nut. (Bot.) (a) Nux vomica. (b) The tree which yields this seed (Strychnos Nuxvomica). It is found on the Malabar and Coromandel coasts. Poison oak (Bot.), the poison ivy; also, the more shrubby Rhus diversiloba of California and Oregon. Poison sac. (Zo["o]l.) Same as Poison gland, above. See Illust. under Fang. Poison sumac (Bot.), a poisonous shrub of the genus Rhus (R. venenata); -- also called poison ash, poison dogwood, and poison elder. It has pinnate leaves on graceful and slender common petioles, and usually grows in swampy places. Both this plant and the poison ivy (Rhus Toxicodendron) have clusters of smooth greenish white berries, while the red-fruited species of this genus are harmless. The tree (Rhus vernicifera) which yields the celebrated Japan lacquer is almost identical with the poison sumac, and is also very poisonous. The juice of the poison sumac also forms a lacquer similar to that of Japan. Syn: Venom; virus; bane; pest; malignity. Usage: Poison, Venom. Poison usually denotes something received into the system by the mouth, breath, etc. Venom is something discharged from animals and received by means of a wound, as by the bite or sting of serpents, scorpions, etc. Hence, venom specifically implies some malignity of nature or purpose.
Conium maculatum
Hemlock Hem"lock, n. [OE. hemeluc, humloc, AS. hemlic, hymlic.] 1. (Bot.) The name of several poisonous umbelliferous herbs having finely cut leaves and small white flowers, as the Cicuta maculata, bulbifera, and virosa, and the Conium maculatum. See Conium. Note: The potion of hemlock administered to Socrates is by some thought to have been a decoction of Cicuta virosa, or water hemlock, by others, of Conium maculatum. 2. (Bot.) An evergreen tree common in North America (Abies, or Tsuga, Canadensis); hemlock spruce. The murmuring pines and the hemlocks. --Longfellow. 3. The wood or timber of the hemlock tree. Ground hemlock, or Dwarf hemlock. See under Ground.
Conium maculatum
Hemlock Hem"lock, n. [OE. hemeluc, humloc, AS. hemlic, hymlic.] 1. (Bot.) The name of several poisonous umbelliferous herbs having finely cut leaves and small white flowers, as the Cicuta maculata, bulbifera, and virosa, and the Conium maculatum. See Conium. Note: The potion of hemlock administered to Socrates is by some thought to have been a decoction of Cicuta virosa, or water hemlock, by others, of Conium maculatum. 2. (Bot.) An evergreen tree common in North America (Abies, or Tsuga, Canadensis); hemlock spruce. The murmuring pines and the hemlocks. --Longfellow. 3. The wood or timber of the hemlock tree. Ground hemlock, or Dwarf hemlock. See under Ground.
Conium maculatum
Conine Co"nine (? or ?), n. [From Conium.] (Chem.) A powerful and very poisonous vegetable alkaloid found in the hemlock (Conium maculatum) and extracted as a colorless oil, C8H17N, of strong repulsive odor and acrid taste. It is regarded as a derivative of piperidine and likewise of one of the collidines. It occasions a gradual paralysis of the motor nerves. Called also coniine, coneine, conia, etc. See Conium, 2.
Conium maculatum
Conhydrine Con*hy"drine (? or ?), n. [Conium + hydrate.] (Chem.) A vegetable alkaloid found with conine in the poison hemlock (Conium maculatum). It is a white crystalline substance, C8H17NO, easily convertible into conine.
Conium maculatum
2. (Med.) The common hemlock (Conium maculatum, poison hemlock, spotted hemlock, poison parsley), a roadside weed of Europe, Asia, and America, cultivated in the United States for medicinal purpose. It is an active poison. The leaves and fruit are used in medicine.
Coronium
Coronium Co*ro"ni*um, n. [NL. See Corona.] (Chem. & Astron.) The principal gaseous substance forming the solar corona, characterized by a green line in the coronal spectrum.
D stramonium
Datura Da*tu"ra, n. [NL.; cf. Skr. dhatt?ra, Per. & Ar. tat?ra, Tat?la.] (Bot.) A genus of solanaceous plants, with large funnel-shaped flowers and a four-celled, capsular fruit. Note: The commonest species are the thorn apple (D. stramonium), with a prickly capsule (see Illust. of capsule), white flowers and green stem, and D. tatula, with a purplish tinge of the stem and flowers. Both are narcotic and dangerously poisonous.
Datura stramonium
Jamestown weed James"town` weed` (Bot.) The poisonous thorn apple or stramonium (Datura stramonium), a rank weed early noticed at Jamestown, Virginia. See Datura. Note: This name is often corrupted into jimson, jimpson, and gympsum.
Datura Stramonium
Stramonium Stra*mo"ni*um, n. [NL.; Cf. F. stramoine.] (Bot.) A poisonous plant (Datura Stramonium); stinkweed. See Datura, and Jamestown weed.
Euphonium
Euphonium Eu*pho"ni*um, n. [NL. See Euphony.] (Mus.) A bass instrument of the saxhorn family.
Harmonium
Harmonium Har*mo"ni*um, n. [NL. See Harmony. ] A musical instrument, resembling a small organ and especially designed for church music, in which the tones are produced by forcing air by means of a bellows so as to cause the vibration of free metallic reeds. It is now made with one or two keyboards, and has pedals and stops.
Hormogonium
Hormogonium Hor`mo*go*ni"um, n. [NL., fr. Gr. ?a chain + ? generation.] (Bot.) A chain of small cells in certain alg[ae], by which the plant is propogated.
Meconium
Meconium Me*co"ni*um, n. [L., fr. Gr. ?, fr. ? poppy.] (Med.) (a) Opium. [Obs.] (b) The contents of the fetal intestine; hence, first excrement.
Mercurammonium
Mercurammonium Mer`cur*am*mo"ni*um, n. [Mercuric + ammonium.] (Chem.) A radical regarded as derived from ammonium by the substitution of mercury for a portion of the hydrogen.
Metalammonium
Metalammonium Met`al*am*mo"ni*um, n. [Metal + ammonium.] (Chem.) A hypothetical radical derived from ammonium by the substitution of metallic atoms in place of hydrogen.
Organ harmonium
Organ Or"gan, n. [L. organum, Gr. ?; akin to ? work, and E. work: cf. F. organe. See Work, and cf. Orgue, Orgy.] 1. An instrument or medium by which some important action is performed, or an important end accomplished; as, legislatures, courts, armies, taxgatherers, etc., are organs of government. 2. (Biol.) A natural part or structure in an animal or a plant, capable of performing some special action (termed its function), which is essential to the life or well-being of the whole; as, the heart, lungs, etc., are organs of animals; the root, stem, foliage, etc., are organs of plants. Note: In animals the organs are generally made up of several tissues, one of which usually predominates, and determines the principal function of the organ. Groups of organs constitute a system. See System. 3. A component part performing an essential office in the working of any complex machine; as, the cylinder, valves, crank, etc., are organs of the steam engine. 4. A medium of communication between one person or body and another; as, the secretary of state is the organ of communication between the government and a foreign power; a newspaper is the organ of its editor, or of a party, sect, etc. 5. [Cf. AS. organ, fr. L. organum.] (Mus.) A wind instrument containing numerous pipes of various dimensions and kinds, which are filled with wind from a bellows, and played upon by means of keys similar to those of a piano, and sometimes by foot keys or pedals; -- formerly used in the plural, each pipe being considired an organ. The deep, majestic, solemn organs blow. --Pope. Note: Chaucer used the form orgon as a plural. The merry orgon . . . that in the church goon [go]. Barrel organ, Choir organ, Great organ, etc. See under Barrel, Choir, etc. Cabinet organ (Mus.), an organ of small size, as for a chapel or for domestic use; a reed organ. Organ bird (Zo["o]l.), a Tasmanian crow shrike (Gymnorhina organicum). It utters discordant notes like those of a hand organ out of tune. Organ fish (Zo["o]l.), the drumfish. Organ gun. (Mil.) Same as Orgue (b) . Organ harmonium (Mus.), an harmonium of large capacity and power. Organ of Gorti (Anat.), a complicated structure in the cochlea of the ear, including the auditory hair cells, the rods or fibers of Corti, the membrane of Corti, etc. See Note under Ear. Organ pipe. See Pipe, n., 1. Organ-pipe coral. (Zo["o]l.) See Tubipora. Organ point (Mus.), a passage in which the tonic or dominant is sustained continuously by one part, while the other parts move.
Pandemonium
Pandemonium Pan`de*mo"ni*um, n. [NL., from Gr. ?, ?, all + ? a demon.] 1. The great hall or council chamber of demons or evil spirits. --Milton. 2. An utterly lawless, riotous place or assemblage.
Pelargonium
Pelargonic Pel`ar*gon"ic, a. (Chem.) Pertaining to, or designating, an organic acid (called also nonoic acid) found in the leaves of the geranium (Pelargonium) and allied plants.
Pelargonium
Pelargonium Pel`ar*go"ni*um, n. [NL., fr. Gr. ? a stork.] (Bot.) A large genus of plants of the order Geraniace[ae], differing from Geranium in having a spurred calyx and an irregular corolla. Note: About one hundred and seventy species are known, nearly all of them natives of South Africa, and many having very beautiful blossoms. See the Note under Geranium.

Meaning of Onium from wikipedia

- and so on. Compounds of an onium cation and some other anion are known as onium compounds or onium salts. Onium ions and onium compounds are inversely analogous...
- An onium (plural: onia) is a bound state of a particle and its antiparticle. These states are usually named by adding the suffix -onium to the name of...
- quantum chromodynamics. An onium (plural: onia) is the bound state of a particle and its antiparticle. The classic onium is positronium, which consists...
- industrial applications. Other less common onium salts include ammonium and phosphonium salts. A typical onium compound used as a photoinitiator contains...
- the appropriate length and with two methonium, heads have small trimethyl onium heads and flexible links. They all exhibit a depolarizing block. Aminosteroids...
- hydrogen atom, such as a quaternary ammonium or phosphonium cation (generally: onium ions), and with a negatively charged functional group, such as a carboxylate...
- afford methyl halides: ROCH3 + HBr → CH3Br + ROH These reactions proceed via onium intermediates, i.e. [RO(H)CH3]+Br−. Some ethers undergo rapid cleavage with...
- structure on the right) with the strong Coulombic attraction between the "onium" atom and the adjacent carbon accounting for the reduced bond length. Consequently...
- primary use as a denaturant and its chemical nature as a cation, hence -onium as a Neo-Latin suffix. Denatonium is a quaternary ammonium cation. It is...
- polyatomic ions encountered in practice is very large. Monatomic ion Protonation Onium ion Petrucci, Ralph H.; Herring, F. Geoffrey; Madura, Jeffry D.; Bissonnette...