acid-fast

ADJECTIVE /æsɪd_,fæst/
9 LETTERS · 2 SYLLABLES · STARTS WITH A

acid-fast is a valid 9-letter word worth 14 points in Scrabble and 15 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
A1C3I1D2-0F4A1S1T1
1 + 3 + 1 + 2 + 0 + 4 + 1 + 1 + 1 =14 PTS
DOUBLE WORD → 28TRIPLE WORD → 42
MEANING

What does acid-fast mean?

ADJECTIVE · 1 SENSE
1

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