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methylene blue
noun
, Chemistry, Pharmacology.
- a dark-green, crystalline compound, C 1 6 H 1 8 ClN 3 S, 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.
methylene blue
noun
- a dark-green crystalline compound forming a blue aqueous solution, used as a mild antiseptic and biological stain. Formula: C 16 H 18 N 3 SCl.3H 2 O Also calledmethylthionine chloride
methylene blue
- A basic dye that forms a deep blue solution when dissolved in water. It is used as an antidote for cyanide poisoning and as a bacteriological stain. Chemical formula: C 16 H 18 N 3 SCl.
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Word History and Origins
Origin of methylene blue1
First recorded in 1885–90
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Example Sentences
The most promising of the methods which have been devised are cryoscopy, the methylene-blue test, and the phloridzin test.
From Project Gutenberg
Counterstain in methylene blue, aqueous solution thirty seconds.
From Project Gutenberg
Counterstain with Kuehne's carbolic methylene-blue for one or two minutes.
From Project Gutenberg
Stain carbolic methylene-blue, carbolic fuchsin, and Gram's method.
From Project Gutenberg
From the resulting growths make cover-slip preparations and stain carbolic methylene-blue, Neisser's method, Gram's method.
From Project Gutenberg
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