Medical Dictionary

acid–fast

adj \ˈas-əd-ˌfast\

Definition of ACID-FAST

:  not easily decolorized by acids (as when stained)—used especially of bacteria and tissues
April 01, 2015
diapause Hear it
a period of physiological dormancy
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears