acid-fast

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ac·id-fast

(ăs′ĭd-făst′)
adj.
Not decolorized by acid after staining, as bacteria that retain dye after an acid rinse.

ac′id-fast′ness n.

acid-fast

adj
(Microbiology) (of bacteria and tissues) resistant to decolorization by mineral acids after staining

ac′id-fast`



adj.
resistant to decolorizing by acidified alcohol after staining.
[1900–05]
ac′id-fast`ness, n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.acid-fast - not easily decolorized by acid solutions; pertains to micro-organisms (especially the tubercle bacillus that causes tuberculosis)
imperviable, impervious - not admitting of passage or capable of being affected; "a material impervious to water"; "someone impervious to argument"
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References in periodicals archive ?
Mycobacterium fortuitum: um novo bacilo acido-resistente patogenico para o homen [Mycobacterium fortuitum: new acid fast bacillus pathogenic for man].
Other routine blood examinations were normal, and 2 samples of sputum smear microscopy for acid fast bacillus (AFB) were negative.