A derisive term for a lowlife or a slob (could be treated as plural or single).
An oval bacterium, as distinguished from a spherical coccus or rod-shaped bacillus
Plural of bacterium, [capitalized] A genus of gressorial orthopterous pests, for the family Phasmidæ; the stick-insects or walking-sticks. B. sarmentosa is all about 10 inches very long. See Phasmidæ.
(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; crucial as pathogens and biochemical properties; taxonomy is difficult; frequently regarded as being plants