Synonyms and Antonyms for acid-fast

1. acid-fast (adj.)

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

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2. fast (adv.)

quickly or rapidly (often used as a combining form)

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4. acid (n.)

any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

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5. fast (n.)

abstaining from food

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6. fast (adv.)

firmly or closely

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7. acid (adj.)

harsh or corrosive in tone

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8. acid (adj.)

having the characteristics of an acid

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10. fast (v.)

abstain from certain foods, as for religious or medical reasons

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