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Definition of Bacterium
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 to be plants.
Examples of category: Immune Reaction, Immune Response, Immunologic Response, Bioremediation, Resistance, Microphage, Peritrichous, Gram-positive, Gram-negative
Generic synonyms: Micro-organism, Microorganism
Specialized synonyms: Acidophil, Acidophile, Probiotic, Probiotic Bacterium, Probiotic Flora, Probiotic Microflora, Bacteroid, Eubacteria, Eubacterium, True Bacteria, Calymmatobacterium, Genus Calymmatobacterium, Francisella, Genus Francisella, Gonococcus, Neisseria Gonorrhoeae, Legionella, Legionella Pneumophilia, Nitrobacterium, Penicillin-resistant Bacteria, Pus-forming Bacteria, Rod, Diplococcus, Superbug
Category relationships: Microbiology
Derivative terms: Bacterial, Bacterial, Bacterioidal, Bacterise, Bacterize
Definition of Bacterium
1. n. A microscopic vegetable organism, belonging to the class Algæ, usually in the form of a jointed rodlike filament, and found in putrefying organic infusions. Bacteria are destitute of chlorophyll, and are the smallest of microscopic organisms. They are very widely diffused in nature, and multiply with marvelous rapidity, both by fission and by spores. Certain species are active agents in fermentation, while others appear to be the cause of certain infectious diseases. See Bacillus.
Definition of Bacterium
1. [n -RIA]
Medical Definition of Bacterium
1.