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Gram's method

[gramz] /græmz/
noun, (sometimes lowercase)
1.
a method of staining and distinguishing bacteria, in which a fixed bacterial smear is stained with crystal violet, treated with Gram's solution, decolorized with alcohol, counterstained with safranine, and washed with water.
Origin
named after Hans C. J. Gram (1853-1938), Danish bacteriologist
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for grams method

Gram's method

noun
1.
(bacteriol) a staining technique used to classify bacteria, based on their ability to retain or lose a violet colour, produced by crystal violet and iodine, after treatment with a decolorizing agent See also Gram-negative, Gram-positive
Word Origin
C19: named after Hans Christian Joachim Gram (1853–1938), Danish physician
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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grams method in Medicine

Gram's method (grāmz)
n.
A staining technique used to classify bacteria in which a bacterial specimen is first stained with crystal violet, then treated with an iodine solution, decolorized with alcohol, and counterstained with safranine. Gram-positive bacteria retain the violet stain; gram-negative bacteria do not. Also called Gram's stain.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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8
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