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methane US English

A colorless, odorless flammable gas that is the main constituent of natural gas. It is the simplest member of the alkane series of hydrocarbons

methane hydrate US English

A crystalline solid consisting of methane molecules trapped under pressure in ice in a clathrate structure.

methane sulphonic acid US English

A corrosive substance, CH3SO2OH, which melts at around room temperature (&c.20°C) and is used as a catalyst in esterification, alkylation, and polymerization reactions.

biomethane US English

Methane produced by the fermentation of organic matter