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Adjective: acid-fast  'asid `făst
  1. Not easily decolourized by acid solutions; pertains to micro-organisms (especially the tubercle bacillus that causes tuberculosis)

See also: imperviable, impervious

Encyclopedia: Acid-fast

Nearest

acid hydrogen
acid precipitation
acid rain
acid rock
acid test
acid value
acid-base balance
acid-base equilibrium
acid-base indicator
acidemia
acid-fast
acid-forming
acidic
acidic hydrogen
acidification
acidify
acidimetric
acidimetry
acidity
acid-loving
acidly