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WordReference Random House Unabridged Dictionary of American English © 2024ar•chae•bac•te•ri•a (är′kē bak tēr′ē ə),USA pronunciation n. pl., sing. -te•ri•um (-tēr′ē əm).USA pronunciation - Microbiologya 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 (är′kē ō bak tēr′ē ə).USA pronunciation - Neo-Latin, equivalent. to archae-, irregularly for archaeo- archaeo- (perh. an erroneous Latinizing of Greek arche- arche-) + bacteria bacteria
- 1977
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