Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An organism, such as a bacterium, that can live in the absence of atmospheric oxygen.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An anaerobic organism; one that does not require oxygen to sustain its metabolic processes.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an organism (especially a bacterium) that does not require air or free oxygen to live

Etymologies

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