Definition of methanogen in English:



  • A methane-producing bacterium, especially an archaean which reduces carbon dioxide to methane.

    • ‘Since the discovery that methanogens belong to the Archaea and not to the Bacteria, a number of other archaeal groups have been discovered.’
    • ‘Methane is formed by a unique group of anaerobic bacteria belonging to the Archaea, the methanogens.’
    • ‘Dog feces naturally contain bacteria called methanogens, which use hydrogen to break down carbon dioxide into microbial food.’
    • ‘In this regard, both the phylogeny and function of archaeal selenoproteins are consistent with the argument that the archaeal ancestor was a methanogen.’
    • ‘Among the archaebacteria, the genome that is most similar to yeast at all thresholds is that of the methanogen Methanosarcina mazei.’