- methanogen
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—methanogenic, adj./me than"euh jeuhn, -jen'/, n.any of a diverse group of widely distributed archaebacteria that occur in anaerobic environments, as the intestinal tracts of animals, freshwater and marine sediments, and sewage, and are capable of producing methane from a limited number of substrates, including carbon dioxide and hydrogen, acetate, and methylamines: an important source of natural gas.[1975-80; METHANE- + -O- + -GEN]
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Universalium. 2010.