carbon dioxide

Noun

1.

carbon dioxide - a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis Synonyms: carbonic acid gas, CO2

Dry Ice, Freon, acetylene, ammonia, argon, asphyxiating gas, butane, carbon monoxide, chlorine, coal gas, coolant, ethane, ether, ethyl chloride, ethylene, fluorine, formaldehyde, freezing mixture, helium, hydrogen, ice, ice cubes, illuminating gas, krypton, lewisite, liquid air, liquid helium, liquid oxygen, marsh gas, methane, mustard gas, natural gas, neon, nitrogen, oxygen, ozone, poison gas, propane, radon, refrigerant, sewer gas, xenon