aerobe

[air-ohb] /ˈɛər oʊb/
noun
1.
an organism, especially a bacterium, that requires air or free oxygen for life (opposed to anaerobe).
Origin
1875-80; aer- + (micr)obe
British Dictionary definitions for aerobe

aerobe

/ˈɛərəʊb/
noun (pl) -obes, -obia (-ˈəʊbɪə)
1.
an organism that requires oxygen for respiration Compare anaerobe
Word Origin
C19: from aero- + Greek bios life. Compare microbe
aerobe in Medicine

aerobe aer·obe (âr'ōb')
n.
An organism, such as a bacterium, requiring oxygen to live.

aerobe in Science
aerobe
  (âr'ōb')   
An organism, such as a bacterium, that can or must live in the presence of oxygen. Compare anaerobe.
Encyclopedia Article for aerobe

an organism able to live and reproduce only in the presence of free oxygen (e.g., certain bacteria and certain yeasts). Organisms that grow in the absence of free oxygen are termed anaerobes; those that grow only in the absence of oxygen are obligate, or strict, anaerobes. Some species, called facultative anaerobes, are able to grow either with or without free oxygen. Certain others, able to grow best in the presence of low amounts of oxygen, are called microaerophiles.

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