methanogen

me·than·o·gen  (m-thn-jn)

n.

Any of various archaea capable of producing methane from the decomposition of organic material.

Thesaurus

Noun

1.

methanogen - archaebacteria found in anaerobic environments such as animal intestinal tracts or sediments or sewage and capable of producing methane; a source of natural gas archaebacteria, archaebacterium, archaeobacteria, archeobacteria - considered ancient life forms that evolved separately from bacteria and blue-green algae