1. a colorless, odorless, incombustible gas, CO 2, present in the atmosphere and formed during respiration, usually obtained from coal, coke, or natural gas by combustion, from carbohydrates by fermentation, by reaction of acid with limestone or other carbonates, or naturally from springs: used extensively in industry as dry ice, or carbon dioxide snow, in carbonated beverages, fire extinguishers, etc.
2. Carbon dioxide is a chemical compound of carbon and oxygen and therefore belongs to the group of carbon oxides besides carbon monoxide, carbon suboxide and the unstable carbon trioxide.
carbonic-acid gas, carbonic anhydride
Carbon, Greenhouse gas
http://www.dictionary.com/browse/carbon-dioxide (1.); http://www.chemie.de/lexikon/Kohlenstoffdioxid.html (2.)
Author: Frithjof Kühnert