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Definitions

methane

[meth-eyn, mee-theyn] / ˈmɛθ eɪn, ˈmi θeɪn /
NOUN
marsh 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.

Together, the methane and carbon dioxide measurements point to a formation history that differs significantly from that of most comets that originated around our Sun.

From Science Daily • Jun. 4, 2026

Water is less volatile than methane or carbon dioxide, which means its gas production shuts down more quickly as the comet cools.

From Science Daily • Jun. 4, 2026

Tools such as CalEnviroScreen or PSE’s methane risk map can help people locate pollution sources, toxic facilities and other threats in their area.

From Los Angeles Times • May 27, 2026

Investors should make financing methane reductions a priority, consistent with the consensus of nearly 200 countries at the 2023 United Nations Climate Change Conference in Dubai.

From The Wall Street Journal • May 21, 2026

Given a moist planet with methane, formaldehyde, ammonia, and some usable minerals, all of which abound, exposed to lightning or ultraviolet irradiation at the right temperature, life might start off almost anywhere.

From "The Lives of a Cell" by Lewis Thomas




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