Reference meaning
bacterium
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(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 to be plants
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This definition is reproduced from Princeton WordNet 3.0, sense 01348530-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.