CO2

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Noun1.CO2 - a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis
blackdamp, chokedamp - the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life
dioxide - an oxide containing two atoms of oxygen in the molecule
greenhouse emission, greenhouse gas - a gas that contributes to the greenhouse effect by absorbing infrared radiation
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References in periodicals archive ?
Long-time German CO2 pistol maker Umarex has carved a huge niche in the world of air pistols with its steadily growing variety of pellet-firing replicas of some of the world's TOP centerfire handguns.
There is no doubt that this Russian CO2 pistol is potent and accurate enough to drill empty pop cans and even dispatch wayward backyard pests at ranges of up to 15 yards or so.
The new Gamo Model 977 CO2 pistol features a laser sight built into the 4" rifled barrel.