We found 14 dictionaries that define the word methanogens:

General (6 matching dictionaries)

1. methanogens: Merriam-Webster
2. methanogens: Wordnik
3. methanogens: Wiktionary
4. methanogens: Dictionary.com
5. Methanogens: Wikipedia, the Free Encyclopedia
6. Methanogens: TheFreeDictionary.com

Business (1 matching dictionary)

7. Methanogens: Energy Dictionary

Computing (1 matching dictionary)

8. Methanogens: Encyclopedia

Medicine (3 matching dictionaries)

9. methanogens: Merriam-Webster Medical Dictionary
10. online medical dictionary (No longer online)
11. Methanogens: Medical dictionary

Science (2 matching dictionaries)

12. Agricultural Thesaurus and Glossary (No longer online)
13. On-Line Biology Book: GLOSSARY (No longer online)

Tech (1 matching dictionary)

14. AUTOMOTIVE TERMS (No longer online)

(Note: See methanogen as well.)

Definitions from Wiktionary (methanogen) ▸ noun:  Any of various archaebacteria capable of methanogenesis. ▸ Also see methanogen Opposite: methanotrophs, methane oxidizers ▸ Words similar to methanogens ▸ Usage examples for methanogens ▸ Idioms related to methanogens ▸ Wikipedia articles (New!) ▸ Popular adjectives describing methanogens ▸ Words that often appear near methanogens ▸ Rhymes of methanogens ▸ Invented words related to methanogens