acid-fast
adjective
ac·id-fast ˈa-səd-ˌfast 
: not easily decolorized by acids
Word History
First Known Use
1903, in the meaning defined above
Medical Definition
acid-fast
adjective
ˈas-əd-ˌfast
: not easily decolorized by acids (as when stained) —used especially of bacteria and tissues
- foller
- folles
- folletti
- folletto
- follicle
- follicle mite
- follicle-stimulating hormone
- follicles
- follicular
- follicular hormone
- follicular mange
- folliculate
- folliculated
- follicule
- Folliculina
- folliculinid
- folliculitis
- folliculitises
- folliculose
- follies
- follis
- follow
- follow about
- follow around
- follow block