Definition of methanogen in English:

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Pronunciation: /ˈmɛθənə(ʊ)dʒ(ə)n/


A methane-producing bacterium, especially an archaean which reduces carbon dioxide to methane.
Example sentences
  • Dog feces naturally contain bacteria called methanogens, which use hydrogen to break down carbon dioxide into microbial food.
  • Methane is formed by a unique group of anaerobic bacteria belonging to the Archaea, the methanogens.
  • Since the discovery that methanogens belong to the Archaea and not to the Bacteria, a number of other archaeal groups have been discovered.



Pronunciation: /mɛθənə(ʊ)ˈdʒɛnɪk/ /məˈθənə(ʊ)ˌdʒɛnɪk/
Example sentences
  • The association between anaerobic heterotrichous ciliates and endosymbiotic methanogenic archaea depends on the presence of hydrogenosomes that provide intracellular hydrogen as a substrate for methane formation.
  • Until recently, the distribution of these functions has been limited to methanogenic archaea and methylotrophic proteobacteria, and their evolutionary history remained obscure.
  • Sulfate-reducing bacteria directly compete with methanogenic bacteria for vital substrates, such as hydrogen and acetate.
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