Definition of Carbon dioxide Carbon dioxide: A gas which is the
byproduct of cellular metabolism and which collects in the
tissues, is cleared from the tissues by the blood within the
veins, is carried by the hemoglobin in the red blood cells, and
removed from the body via the lungs in the exhaled air.
Abbreviated CO2.Source: MedTerms™ Medical Dictionary Last
Editorial Review: 6/14/2012 Find out what women really need.