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archaebacteria

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Bacteria
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ar⋅chae⋅bac⋅te⋅ri⋅a

  [ahr-kee-bak-teer-ee-uh]
Use archaebacteria in a Sentence
–plural noun, singular -te⋅ri⋅um  [-teer-ee-uhm] .
a group of microorganisms, including the methanogens and certain halophiles and thermoacidophiles, that have RNA sequences, coenzymes, and a cell wall composition that are different from all other organisms: considered to be an ancient form of life that evolved separately from the bacteria and blue-green algae and sometimes classified as a kingdom.
Also, ar⋅chae⋅o⋅bac⋅te⋅ri⋅a  [ahr-kee-oh-bak-teer-ee-uh] .

Origin:
1977; < NL, equiv. to archae-, irreg. for archaeo- archaeo- (perh. an erroneous Latinizing of Gk arche- arche- ) + bacteria bacteria
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Bacteria
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ar·chae·bac·te·ri·um   (är'kē-bāk-tîr'ē-əm)   
n.   pl. ar·chae·bac·te·ri·a
An archaeon.

[archae(o)- + bacterium.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Science Dictionary
archaebacterium   (är'kē-bāk-tîr'ē-əm)  Pronunciation Key 
Plural archaebacteria
See archaeon.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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