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calomelenUK
cal·o·mel C0042000 (kăl′ə-mĕl′, -məl)n. A white or brown tasteless powder, Hg2Cl2, used as an insecticide and formerly as a purgative. Also called mercurous chloride.
[Probably from New Latin calomelās : Greek kalos, beautiful + melās, black.]calomel (ˈkæləˌmɛl; -məl) n (Elements & Compounds) a colourless tasteless powder consisting chiefly of mercurous chloride, used medicinally, esp as a cathartic. Formula: Hg2Cl2[C17: perhaps from New Latin calomelas (unattested), literally: beautiful black (perhaps so named because it was originally sublimed from a black mixture of mercury and mercuric chloride), from Greek kalos beautiful + melas black]cal•o•mel (ˈkæl əˌmɛl, -məl)
n. a white, tasteless powder, Hg2Cl2, used chiefly as a purgative and fungicide. Also called mercurous chloride. [1670–80; < New Latin calomelas] Thesaurus| Noun | 1. | calomel - a tasteless colorless powder used medicinally as a catharticmercurous chlorideblack lotion, blackwash - a mixture of calomel and limewater that is used on syphilitic soresatomic number 80, Hg, hydrargyrum, mercury, quicksilver - a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatureschloride - any compound containing a chlorine atom |
TranslationsCalomelenUK
calomel[′kal·ə·məl] (mineralogy) Hg2Cl2 A colorless, white, grayish, yellowish, or brown secondary, sectile, tetragonal mineral; used as a cathartic, insecticide, and fungicide. Also known as calomelene; calomelite; horn quicksilver; mercurial horn ore. Calomel (from the Greek kalos, “beautiful,” and melas, “black”), mercurous chloride, Hg2Cl2; a colorless powder. When treated with caustic alkalies or ammonia, it turns black (hence the name). The darkening occurs as result of the precipitation of finely powdered mercury according to the reactions Hg2Cl2 + 2NaOH - Hg + HgO + 2NaCl + H2O Hg2Cl2 + 2NH 4OH = HgNH2Cl + Hg + NH4C1 + 2H2O Calomel has a density of 7, 160 kg/m3 and evaporates without fusion. Its sublimation point is 383.7°C. It is poorly soluble in water. Calomel is used in the preparation of calomel electrodes and as a catalyst in organic reactions. In medicine it serves as an antibacterial agent, applied externally in ointment form in cases of wart infections and gonorrheal conjunctivitis and as a safeguard against venereal diseases (locally). Calomel is sometimes used internally as a cholagogue. In nature calomel exists as a rare mineral of the halide group.It crystallizes in the tetragonal system and has an adamantineluster. Its hardness on the mineralogical scale measures 1.5.Native calomel exhibits very high double refraction. It is formedin the oxidation zone of mercury deposits. calomelenUK
cal·o·mel (kal'ō-mel), Mild mercury chloride; mercury monochloride, protochloride, or subchloride; has been used as an intestinal antiseptic and laxative; replaced by safer agents. Synonym(s): mercurous chloride, sweet precipitate [Mediev. L., fr. G. kalos, beautiful, + melas, black] calomel (kăl′ə-mĕl′, -məl)n. A white or brown tasteless powder, Hg2Cl2, used as an insecticide and formerly as a purgative. Also called mercurous chloride.calomel (kal'o-mel) [Gr. kalos, beautiful, + melas, black] A former name for mercury (I) chloride The term is still in use in “calomel electrode.” Mercury (I) chloride.calomelenUK
Related to calomel: calomel electrodeSynonyms for calomelnoun a tasteless colorless powder used medicinally as a catharticSynonymsRelated Words- black lotion
- blackwash
- atomic number 80
- Hg
- hydrargyrum
- mercury
- quicksilver
- chloride
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