Also found in: Thesaurus, Medical, Encyclopedia.
n. pl. ar·chae·bac·te·ri·a
pl n, sing -rium (-rɪəm)
(Microbiology) (formerly) a group of microorganisms now regarded as members of the Archaea. See archaean
[from archaeo- + bacteria]
ar•chae•bac•te•ri•a(ˌɑr ki bækˈtɪər i ə)
also ar•chae•o•bac•te•ri•a(ˌɑr ki oʊ-)
n.pl., sing. -te•ri•um (-ˈtɪər i əm)
a group of microorganisms, including methanogens and halobacteria, that are genetically and functionally different from all other living forms, thrive in oxygen-poor environments, and are sometimes classified as a separate kingdom.
Switch to new thesaurus
|Noun||1.||archaebacteria - considered ancient life forms that evolved separately from bacteria and blue-green algae|
moneran, moneron - organisms that typically reproduce by asexual budding or fission and whose nutritional mode is absorption or photosynthesis or chemosynthesis
division Archaebacteria - in some classifications considered a kingdom
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
thermoacidophile - archaebacteria that thrive in strongly acidic environments at high temperatures