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archaebacterium

American  
[ahr-ki-bak-teer-i-uhm] / ˌɑr kɪ bækˈtɪər ɪ əm /

noun

plural

archaebacteria

  1. any of the archaea, formerly classified with the bacteria.

archaebacterium Scientific  
/ är′kē-băk-tîr′ē-əm /

plural

archaebacteria

  1. A former name for archaeon

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.