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Definitions

carbon dioxide

[kahr-buhn dahy-ok-sahyd] / ˈkɑr bən daɪˈɒk saɪd /
NOUN
colorless odorless gas
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s one of the nation’s largest sources of sulfur dioxide, which forms haze and harms the respiratory system, and the second-largest source of carbon dioxide, according to EPA data.

From Salon • May 10, 2026

Methane, the second biggest contributor to climate change, stays in the atmosphere for far less time than carbon dioxide, but its warming effect is roughly 80 times more potent over a 20-year period.

From Barron's • May 4, 2026

They help fight climate change by absorbing vast amounts of carbon dioxide and are considered incredibly important habitats.

From BBC • May 2, 2026

Using the same ice samples, Marks-Peterson and her team produced the first direct measurements of carbon dioxide and methane levels spanning the past 3 million years.

From Science Daily • Apr. 24, 2026

Like Venus, the Earth also has about 90 atmospheres of carbon dioxide; but it resides in the crust as limestone and other carbonates, not in the atmosphere.

From "Cosmos" by Carl Sagan




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