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archaebacteria definition

ar·chae·bac·te·ria (är′kē bak tir′ē ə)

plural noun sing. archaebacterium -·rium (-əm) or archaebacteria -·ria

any of a large group of primitive bacteria having unusual cell walls, membrane lipids, ribosomes, and RNA sequences, and having the ability to produce methane and to live in anaerobic, extremely hot, salty, or acidic conditions; archaea

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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