| methanogen | A methane-producing prokaryote, member of the Archaea. (09 Oct 1997) |
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| methanogenesis | The biological production of methane. (09 Oct 1997) |
| methanogens | Common name of organisms requiring completely anaerobic conditions for growth and producing methane gas as a catabolic product. Methanogens are found in the bovine stomach, swamp mud, and other environments in which oxygen is not present. There are four taxonomic orders: methanobacteriales, methanococcales, methanomicrobiales, and methanosarcinales. (12 Dec 1998) |