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plural noun, singular bac·te·ri·um 
[-teer-ee-uhm] .
[-teer-ee-uhm] . ubiquitous one-celled organisms, spherical, spiral, or rod-shaped and appearing singly or in chains, comprising the Schizomycota, a phylum of the kingdom Monera (in some classification systems the plant class Schizomycetes), various species of which are involved in fermentation, putrefaction, infectious diseases, or nitrogen fixation.
Related forms
bac·te·ri·al, adjective
bac·te·ri·al·ly, adverb
non·bac·te·ri·al, adjective
non·bac·te·ri·al·ly, adverb
un·bac·te·ri·al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Bacterial
is always a great word to know.
So is quincunx. Does it mean:
| a scrap or morsel of food left at a meal. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
Collins
World English Dictionary
| bacteria (bækˈtɪərɪə) | |
| —pl n , sing -rium | |
| See also prokaryote 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 animals | |
| [C19: plural of New Latin bacterium, from Greek baktērion, literally: a little stick, from baktron rod, staff] | |
| bac'terial | |
| —adj | |
| bac'terially | |
| —adv | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Science Dictionary
| bacterium (bāk-tîr'ē-əm) Pronunciation Key
Plural bacteria Any of a large group of one-celled organisms that lack a cell nucleus, reproduce by fission or by forming spores, and in some cases cause disease. They are the most abundant lifeforms on Earth, and are found in all living things and in all of the Earth's environments. Bacteria usually live off other organisms. Bacteria make up most of the kingdom of prokaryotes (Monera or Prokaryota), with one group (the archaea or archaebacteria) often classified as a separate kingdom. See also archaeon, prokaryote. bacterial adjective Our Living Language : It is important to remember that bacteria is the plural of bacterium, and that saying a bacteria is incorrect. It is correct to say The soil sample contains millions of bacteria, and Tetanus is caused by a bacterium. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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