METHANE
\mˈiːθe͡ɪn], \mˈiːθeɪn], \m_ˈiː_θ_eɪ_n]\
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Marsh-gas, CH4; an odorless gas produced by the decomposition of organic matter; it is explosive when mixed with seven or eight volumes of air, constituting then the fire-damp in coal-mines.
By Stedman, Thomas Lathrop
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Marsh-gas; the saturated hydrocarbon, CH4, which forms the first member of the paraffin series. A colorless, odorless gas produced in the decomposition of organic matter (especially cellulose) by a peculiar fermentation (see Fermentation), and occurring in marshes, etc. and in the intestines.
By Alexander Duane
By Willam Alexander Newman Dorland
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British Crown
- symbol power monarchy; "members of Commonwealth owe allegiance to the British Crown"