Definition of acid-fast in English:

acid-fast

Line breaks: acid-fast

Entry from British & World English dictionary

adjective

Microbiology
  • Denoting bacteria that cannot be decolorized by an acid after staining, which is characteristic of the mycobacteria that cause tuberculosis and leprosy.

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Word of the day coloratura
Pronunciation: ˌkələrəˈto͝orə
noun
elaborate ornamentation of a vocal melody