Bacteria definition

baktirēə
Frequency:
(pejorative, slang) A derisive term for a lowlife or a slob (could be treated as plural or singular).
noun
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Any of a division (Bacteria) of monerans, microorganisms which are typically one-celled, have no chlorophyll, multiply by simple division, and can be seen only with a microscope: they occur in three main forms, spherical (cocci), rod-shaped (bacilli), and spiral (spirilla): some bacteria cause diseases such as pneumonia and anthrax, and others are necessary for fermentation, nitrogen fixation, etc.
pluralNoun
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The definition of bacteria are microorganisms that are the basis of fermentation and infectious diseases.

An example of bacteria are the organisms that cause common human illnesses like strep throat.

noun
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(dated, medicine) An oval bacterium, as distinguished from a spherical coccus or rod-shaped bacillus.
noun
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(US) A type, species, or strain of bacterium.
noun
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0
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(US, proscribed) Alternative form of bacterium.
noun
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In the three-domain system, a taxonomic domain comprising the single kingdom also called Bacteria, containing about 25 phyla.
pronoun
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In the two-empire system, a taxonomic kingdom, within domain Prokaryota: single cell organisms (the bacteria); once divided into the Archaebacteria and Eubacteria.
pronoun
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Plural form of bacterium.
noun
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Other Word Forms

Noun

Singular:
bacteria
Plural:
bacteriae

Origin of bacteria

  • From New Latin bacteria, plural of bacterium, from Ancient Greek βακτήριον (baktērion), neuter diminutive of βακτηρία (baktēria, “rod, stick”).

    From Wiktionary

  • From New Latin bacteria, from Ancient Greek βακτηρία (baktēria, “rod, stick”).

    From Wiktionary

  • From Ancient Greek βακτηρία (baktēria, “rod”)

    From Wiktionary