noun (plural bacteria) Etymology: New Latin, from Greek baktērion staff Date: circa 1849 any of a domain (Bacteria) of prokaryotic round, spiral, or rod-shaped single-celled microorganisms that may lack cell walls or are gram-positive or gram-negative if they have cell walls, that are often aggregated into colonies or motile by means of flagella, that typically live in soil, water, organic matter, or the bodies of plants and animals, that are usually autotrophic, saprophytic, or parasitic in nutrition, and that are noted for their biochemical effects and pathogenicity; broadly prokaryotecompare archaea, eukaryote

New Collegiate Dictionary. 2001.

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  • Bacterĭum — Duj., s. Bacillus …   Meyers Großes Konversations-Lexikon

  • Bacterium — vgl. Bakterie …   Das Wörterbuch medizinischer Fachausdrücke

  • bacterium — c.1848, singular of BACTERIA (Cf. bacteria) (q.v.) …   Etymology dictionary

  • BACTERIUM — COIil COMMUNE быть обнаружены в желчи. При непосредственном введении бактерий в портальную систему печень может совершенно не пропускать их в общий круг кровообращения, выбрасывая их через желчь в кишечник; при повреждении же печени бактерии в… …   Большая медицинская энциклопедия

  • bacterium — *germ, microbe, bacillus, virus …   New Dictionary of Synonyms

  • bacterium — is a singular noun and its plural is bacteria. Erroneous uses of bacteria as a singular noun are regrettably common in newspapers: • A common gut bacteria may be a major cause of rheumatoid arthritis Independent, 1991 …   Modern English usage

  • bacterium — [bak tir′ē əm] n. sing. of BACTERIA …   English World dictionary

  • Bacterium — A single celled microorganism which can exist either as an independent (free living) organism or as a parasite (dependent upon another organism for life). Examples include: {{}}Acidophilus, a normal inhabitant of yogurt, Chlamydia, which causes… …   Medical dictionary

  • bacterium — [19] Bacterium was coined in the 1840s from Greek baktérion, a diminutive of bad 46 báktron ‘stick’, on the basis that the originally discovered bacteria were rod shaped. At first it was sometimes anglicized to bactery, but the Latin form has… …   The Hutchinson dictionary of word origins

  • bacterium — [[t]bæktɪ͟ərɪʊm[/t]] Bacterium is the singular of bacteria …   English dictionary

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