bacteria has definitions from the field of biology
1
[ noun ] (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered plants

Synonyms

bacterium

Used in print

(Ross E. McKinney and Howard Edde, "Aerated...)

The vegetables were not readily metabolized by the bacteria in the aeration unit and tended to float on the surface .

The bacteria formed typical activated sludge floc .

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