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bacteria

[ bak-teer-ee-uh ]
/ bækˈtɪər i ə /
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plural noun, singular bac·te·ri·um [bak-teer-ee-uhm]. /bækˈtɪər i əm/. Microbiology.

ubiquitous one-celled organisms, spherical, spiral, or rod-shaped and appearing singly or in chains, comprising numerous and variously classified phyla: among the inestimable number of species are those involved in fermentation, putrefaction, infectious diseases, and nitrogen fixation.

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Set some time apart to test your bracket symbol knowledge, and see if you can keep your parentheses, squares, curlies, and angles all straight!
Question 1 of 7
Let’s start with some etymology: What are the origins of the typographical word “bracket”?
First appeared around 1750, and is related to the French word “braguette” for the name of codpiece armor.
First appeared in 1610, based on the French word “baguette” for the long loaf of bread.
First appeared in 1555, and is related to the French word “raquette” for a netted bat.
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See also Bacteria.

Origin of bacteria

First recorded in 1860–65; from New Latin, from Greek baktḗria, plural of baktḗrion, diminutive of baktēría “staff, cane”; see origin at bacterium

OTHER WORDS FROM bacteria

bac·te·ri·al, adjectivebac·te·ri·al·ly, adverbnon·bac·te·ri·al, adjectivenon·bac·te·ri·al·ly, adverb

Words nearby bacteria

bact., -bacter, bacteraemia, bacteremia, bacteri-, bacteria, bacteria bed, bacterial canker, bacterial capsule, bacterial endocarditis, bacterial infection

Definition for bacteria (2 of 2)

Bacteria
[ bak-teer-ee-uh ]
/ bækˈtɪər i ə /

noun (used with a singular or plural verb)Microbiology.

(in the three-domain system of classification) the taxonomic domain comprising the bacteria.
See also domain (def. 6).

Origin of Bacteria

First recorded in 1860–65; from New Latin; see origin at bacteria
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Content related to bacteria

“Virus” vs. “Bacteria”: What’s The Difference?It’s easy to confuse viruses and bacteria. They share many similarities, but also many differences! Learning these differences can be vital to your health.
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Words related to bacteria

pathogens, germs, organisms, microbes, bacilli

Example sentences from the Web for bacteria

British Dictionary definitions for bacteria

bacteria
/ (bækˈtɪərɪə) /

pl n singular -rium (-rɪəm)

a very large group of microorganisms comprising one of the three domains of living organisms. They are prokaryotic, unicellular, and either free-living in soil or water or parasites of plants or animalsSee also prokaryote

Derived forms of bacteria

bacterial, adjectivebacterially, adverb

Word Origin for bacteria

C19: plural of New Latin bacterium, from Greek baktērion, literally: a little stick, from baktron rod, staff
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for bacteria

bacteria
[ băk-tîr′ē-ə ]

n.

Plural ofbacterium
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for bacteria

bacteria
[ băk-tîr′ē-ə ]

Plural of bacterium.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for bacteria

bacteria

sing. bacterium

Microorganisms made up of a single cell that has no distinct nucleus. Bacteria reproduce by fission or by forming spores.

notes for bacteria

Some bacteria are beneficial to humans (for example, those that live in the stomach and aid digestion), and some are harmful (for example, those that cause disease).
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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