|—pl n , sing -rium|
|See also prokaryote a very large group of microorganisms comprising one of the three domains of living organisms. They are prokaryotic, unicellular, and either free-living in soil or water or parasites of plants or animals|
|[C19: plural of New Latin bacterium, from Greek baktērion, literally: a little stick, from baktron rod, staff]|
bacteria bac·te·ri·a (bāk-tǐr'ē-ə)
Plural of bacterium.