- a colorless, odorless, incombustible gas, CO2, 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.
Origin of carbon dioxide
First recorded in 1870–75
Also called carbonic-acid gas, carbonic anhydride.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for carbon dioxide
And if the buses are fueled with biodiesel, carbon-dioxide emissions would be cut by 90 percent.Volvo Tests Ultra-Efficient Plug-in Hybrid-Electric Diesel Bus
May 17, 2013
The reduction of the carbon-dioxide would be even more gradual.The Story of Evolution
Then air-rejuvenator apparatus reseparated it from the carbon-dioxide you exhaled, so that you could use it over and over.Comet's Burial
Raymond Zinke Gallun
A part is expelled by the lungs as carbon-dioxide, or as it is generally though less correctly termed, carbonic acid.The Chemistry of Food and Nutrition
A. W. Duncan
Every molecule of carbon-dioxide that crystallized out took two atoms of oxygen with it, completely out of circulation.Let'em Breathe Space
Lester del Rey
In the form of carbon-dioxide the leaves eat up the carbon and oxygen from the atmosphere.Beautiful Bulbous Plants
- a colourless odourless incombustible gas present in the atmosphere and formed during respiration, the decomposition and combustion of organic compounds, and in the reaction of acids with carbonates: used in carbonated drinks, fire extinguishers, and as dry ice for refrigeration. Formula: CO 2Also called: carbonic-acid gas
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
Word Origin and History for carbon dioxide
Online Etymology Dictionary, © 2010 Douglas Harper
- A colorless, odorless, incombustible gas formed during respiration, combustion, and organic decomposition and used in inert atmospheres, fire extinguishers, and aerosols.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- A colorless, odorless gas that is present in the atmosphere and is formed when any fuel containing carbon is burned. It is breathed out of an animal's lungs during respiration, is produced by the decay of organic matter, and is used by plants in photosynthesis. Carbon dioxide is also used in refrigeration, fire extinguishers, and carbonated drinks. Chemical formula: CO2.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.