- resistant to decolorizing by acidified alcohol after staining.
Origin of acid-fast
First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for acid-fast
The acid-fast bacteria are particularly rich in fatty substances, especially the higher wax-like fats.The Fundamentals of Bacteriology
Charles Bradfield Morrey
Other bacteria than the acid-fast group are stained blue by Gabbet's method.A Manual of Clinical Diagnosis
James Campbell Todd
This method is supposed to differentiate between B. tuberculosis and other acid-fast micro-organisms.The Elements of Bacteriological Technique
John William Henry Eyre
- (of bacteria and tissues) resistant to decolorization by mineral acids after staining
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- Of or relating to bacteria that are not decolorized by an acidic alcohol solution after they have been stained.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.