acid-fast acid-fast

Definition(s):

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

Usage(s):

  • Non-acid-fast bacteria (such as the typhoid bacillus) yield readily to the " antibodies" produced by the injection of dead bacteria of the same disease.

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effusion effusion
/ɪ ˈfju ʒən/