English word biomethane comes from English methane, English bio- (Life. Organic life.)
| Dictionary entry | Language | Definition |
|---|---|---|
| methane | English (eng) | (organic chemistry, countable) Any of very many derivatives of methane.. (organic compound, uncountable) The simplest aliphatic hydrocarbon, CH4, being a constituent of natural gas. |
| bio- | English (eng) | Life. Organic life. |
| biomethane | English (eng) | A biogas composed mostly of methane. |