the ratio of the amount of carbon dioxide released by the lungs to the amount of oxygen taken in during a given period.
Origin of respiratory quotient
First recorded in 1885–90
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biology the ratio of the volume of carbon dioxide expired to the volume of oxygen consumed by an organism, tissue, or cell in a given time
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
The ratio of carbon dioxide produced by tissue metabolism to oxygen consumed in the same metabolism.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.