Archaebacteria found in anaerobic environments such as animal intestinal tracts or sediments or sewage and capable of producing methane; a source of natural gas
methanogen \methanogen\ n.
A type of archaebacteria found in anaerobic environments such
as animal intestinal tracts or sediments or sewage, and
capable of producing methane; a source of natural gas.
[WordNet 1.5]
