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carbon dioxide

The definition of carbon dioxide is a colorless, odorless gas otherwise known as CO2, that is produced through combustion and respiration.

Facts About Carbon Dioxide

Carbon dioxide is one carbon atom that is joined with two oxygen atoms.
The level of carbon dioxide in the atmosphere has risen drastically in the last 150 years, largely due to burning fossil fuels and deforestation.
Carbon dioxide is found in carbonated drinks (the characteristic that creates the bubbles), in human and animal breath when it is exhaled, is produced from the burning of fossil fuels, is used in fire extinguishers and to make fog using dry ice, and is produced from the decaying of vegetable matter.
Too much carbon dioxide affect respiration and cause headaches, difficulty breathing, dizziness, drowsiness, and death.

(noun)

An example of carbon dioxide is what people exhale when they breathe.

See carbon dioxide in Webster's New World College Dictionary

a colorless, odorless, incombustible gas, CO, somewhat heavier than air, that is a product of respiration and combustion: produced commercially and used widely in fire extinguishers, carbonated beverages, etc.: in photosynthesis, carbon dioxide and water are absorbed by plants, which synthesize certain carbohydrates and release oxygen into the air

See carbon dioxide in American Heritage Dictionary 4

noun

A colorless, odorless, incombustible gas, CO₂, formed during respiration, combustion, and organic decomposition and used in food refrigeration, carbonated beverages, inert atmospheres, fire extinguishers, and aerosols. Also called carbonic acid gas.

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