Methylene blue
Methylene Meth"yl*ene, n. [F. m['e]thyl[`e]ne, from Gr. ? wine + ? wood; -- a word coined to correspond to the name wood spirit.] (Chem.) A divalent hydrocarbon radical, {-CH2-}, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; as, methylene bromide, {CH2Br2}; -- formerly called also {methene}. [1913 Webster]

{Methylene blue} (Chem.), an artificial dyestuff consisting of a complex sulphur derivative of diphenyl amine; -- called also {pure blue}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Methylene blue — Methylene blue …   Wikipedia

  • methylene blue — n. a bluish green aniline dye, C16H18N3ClS·3H2O, used as a bacteriologic stain, an antidote in cyanide poisoning, etc …   English World dictionary

  • methylene blue — noun a dark green dye used as a stain, an antiseptic, a chemical indicator, and an antidote in cyanide poisoning • Syn: ↑methylthionine chloride • Hypernyms: ↑stain, ↑thiazine * * * noun Usage: sometimes capitalized M&B : a basic dye of the… …   Useful english dictionary

  • methylene blue — A basic dye easily oxidized to azure, with dye mixtures; used in histology and microbiology, to stain intestinal protozoa in wet mount preparations, to track RNA and RNase in electrophoresis, and as an antidote for methemoglobinemia; its …   Medical dictionary

  • methylene blue — Chem., Pharm. a dark green, crystalline compound, C16H18ClN3S, that dissolves in water to form a deep blue solution: used chiefly as a dye, as a bacteriological and biological stain, and as an antidote for cyanide poisoning. Also called… …   Universalium

  • Methylene Blue — (= Swiss blue; Basic Blue 9; tetramethythionine chloride) Water soluble dye that can be reduced to a colourless form and can be oxidized by atmospheric oxygen. Used as a stain in bacteriology and histology …   Dictionary of molecular biology

  • methylene blue — meth′ylene blue′ n. pha chem. a dark green, crystalline compound, C16H18ClN3that dissolves in water to form a deep blue solution: used chiefly as a dye, as a biological stain, and as an antidote for cyanide poisoning …   From formal English to slang

  • methylene blue — a blue dye used to stain bacterial cells for microscopic examination …   The new mediacal dictionary

  • methylene blue — noun Date: circa 1890 a basic thiazine dye C16H18ClN3S•3H2O used especially as a biological stain, an antidote in cyanide poisoning, and an oxidation reduction indicator …   New Collegiate Dictionary

  • methylene blue — a dye (3,7 bis (Dimethylamino) phenazathionioum chloride) used against external bacteria and protozoans on fish …   Dictionary of ichthyology

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