- Denoting bacteria that are not decolorized by acid-alcohol after having been stained with dyes such as basic fuchsin; e.g., the mycobacteria and nocardiae.
* * *acid-fast 'as-əd-.fast adj not easily decolorized by acids (as when stained) used esp. of bacteria and tissues
* * *adj.1. describing bacteria that have been stained and continue to hold the stain after treatment with an acidic solution. For example, tuberculosis bacteria are acid-fast when stained with a carbol fuchsin preparation.2. describing a stain that is not removed from a specimen by washing with an acidic solution.
* * *(asґid-fast) not readily decolorized by acid after staining, a characteristic of certain bacteria, particularly Mycobacterium tuberculosis, Mycobacterium leprae, and some species of Nocardia. See under stain.
Medical dictionary. 2011.
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Acid-fast — Acid fastness is a physical property of some bacteria referring to their resistance to decolorization by acids during staining procedures.cite journal |author=Madison B |title=Application of stains in clinical microbiology |journal=Biotech… … Wikipedia
acid-fast — [as′id fast΄] adj. that does not readily lose its color when exposed to acids after being stained: said esp. of certain bacteria and tissues … English World dictionary
acid-fast — adj. 1) describing bacteria that have been stained and continue to hold the stain after treatment with an acidic solution. For example, tuberculosis bacteria are acid fast when stained with a carbol fuchsin preparation. 2) describing a stain that … The new mediacal dictionary
acid-fast — acid fastness, n. /as id fast , fahst /, adj. resistant to decolorizing by acidified alcohol after staining. [1900 05] * * * … Universalium
acid-fast — adjective not easily decolorized by acid solutions; pertains to micro organisms (especially the tubercle bacillus that causes tuberculosis) • Similar to: ↑impervious, ↑imperviable * * * ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ adjective : not easily decolorized by acids… … Useful english dictionary
acid-fast — /ˈæsəd fast/ (say asuhd fahst) adjective resistant to decolourisation by acid after staining … Australian English dictionary
acid-fast — ac′id fast adj. lab resistant to decolorizing by acidified alcohol after staining • Etymology: 1900–05 ac′id fast ness, n … From formal English to slang
acid fast — Refers to bacteria like the mycobacteria that cannot be easily decolorized with acid alcohol after being stained with dyes such as basic fuchsin … Dictionary of microbiology
acid-fast — adjective Date: 1903 not easily decolorized by acids … New Collegiate Dictionary
acid-fast — adjective (histology) of bacteria that retain their stain when treated with an acidic solution … Wiktionary