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Definition of the adjective acid-fast

What does acid-fast mean as an attribute of a noun?


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

Alternative definition of the adjective acid-fast


  1. [context: histology, of bacteria] Retaining stain when treated with an acidic solution.


Acid-fast: Acid-fastness is a physical property of certain bacteria, specifically their resistance to decolorization by acids during staining procedures.

Printed dictionaries and other books with definitions for Acid-fast

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Google previewPhysiology, Pathology, Bacteriology, Anatomy, Dictionary (1904)

Acid-fast bacillus (Marpmann). Rabbits were found immune. In the guinea-pig, intra-peritoneal injection caused congestion of ...

Google previewEncyclopaedia Medica (1902)

by Chalmers Watson

Acid-fast organisms, not tubercle bacilli, have been found by Murray Cowie in films made from scrapings from the udders and teats of healthy cows. Similar organisms are frequently found in butter and cheese. The chief butter bacillus is one ...

Google previewMosby's Dictionary of Medicine, Nursing and Health Professions - Australian & New Zealand Edition (2009)

by Peter Harris, Sue Nagy, Nicholas Vardaxis

acid-fast bacillus (AFB), a type of bacillus that resists decolourising by acid after accepting a stain. Examples include Mycobacterium ...

Google previewIllustrated Dictionary and Resource Directory of Environmental and Occupational Health, Second Edition (2004)

by Herman Koren

acid-fast bacillus acid-fast bacillus — A type of bacteria that resists decolorizing by acid after accepting a stain. acid-fast bacteria — Bacteria, especially Mycobacterium tuberculosis, that resist decolorizing by acids after being ...

Google previewTaber's Cyclopedic Medical Dictionary (2013)

by Donald Venes, MD

acid-fast (as'id-fast')...

Google previewMosby's Pocket Dictionary of Medicine, Nursing & Health Professions (2013)

by Mosby

acid-fast bacillus (AFB), a type of bacillus that resists decolorizing by acid after accepting a stain. Examples include Mycobacterium tuberculosis and M. leprae. acid-fast ...

Google previewChurchill Livingstone Medical Dictionary (2008)

by Chris Brooker

acid-fast adjin microbiology, describes a micro-organism which, when stained, does not become decolorized when ...

Google previewSaunders Comprehensive Veterinary Dictionary (2011)

by Virginia P. Studdert, Clive C. Gay, Douglas C. Blood

acid-fast [as'id-fast] 1.not readily decolorized by acids after staining; saidof bacteria, especially Mycobacterium spp. 2.stain demonstrating this characteristic.See also Ziehl- Neelsen ...

Google previewEncyclopaedic Dictionary of Biology (2003)

by S. Choudhary

acid-fast stain : A staining technique used to determine the cell wall property of a microorganism. After stained with dye such as hot ...

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Acid-fast Meaning

Video shows what acid-fast means. Retaining stain when treated with an acidic solution.. Acid-fast Meaning. How to pronounce, definition audio dictionary.

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