Definition of bacterium

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< bacteriostat

bacteriuria >

bac·te·ri·um

k-tîr

m) KEY

NOUN:
pl. bac·te·ri·a (-tîr

) KEY

Any of the unicellular prokaryotic microorganisms of the class Schizomycetes, which vary in terms of morphology, oxygen and nutritional requirements, and motility, and may be free-living, saprophytic, or pathogenic in plants or animals.

ETYMOLOGY:
New Latin bactrium, from Greek baktrion, diminutive of baktron, rod; see bak- in Indo-European roots

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