Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Not decolorized by acid after staining, as bacteria that retain dye after an acid rinse.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Retaining stain when treated with an acidic solution.

from The Century Dictionary and Cyclopedia

  • A literal translation of the German “säurfest”: applied to a class of bacteria which, when once stained with basic aniline dyes, tenaciously hold the dye on subsequent exposure to acids or alcohol.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. not easily decolorized by acid solutions; pertains to micro-organisms (especially the tubercle bacillus that causes tuberculosis)

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