from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The ratio of the volume of carbon dioxide released to the volume of oxygen consumed by a body tissue or an organism in a given period.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the ratio of the volume of carbon dioxide expired to the volume of oxygen consumed by an organism or cell in a given period of time
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