[ an-uh-roh-bik, an-ai- ]
/ ˌæn əˈroʊ bɪk, ˌæn ɛə- /
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(of an organism or tissue) living in the absence of air or free oxygen.
pertaining to or caused by the absence of oxygen.



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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

Origin of anaerobic

First recorded in 1880–85; anaerobe + -ic
an·aer·o·bi·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for anaerobic

/ (ˌænɛəˈrəʊbɪk) /


(of an organism or process) requiring the absence of or not dependent on the presence of oxygen
of or relating to anaerobes
Compare aerobic
anaerobically, adverb
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

Medical definitions for anaerobic

[ ăn′ə-rōbĭk, -â-rōbĭk ]


Relating to or being an anaerobe.
Living without oxygen.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for anaerobic

[ ăn′ə-rōbĭk ]

Occurring in the absence of oxygen or not requiring oxygen to live. Anaerobic bacteria produce energy from food molecules without the presence of oxygen. Compare aerobic.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for anaerobic

[ (an-uh-roh-bik, an-air-oh-bik) ]

A descriptive term for a process, such as fermentation, that can proceed only in the absence of oxygen, or a living thing that can survive only in the absence of oxygen. (Compare aerobic.)

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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