archaebacterium

noun

ar·​chae·​bac·​te·​ri·​um ˌär-kē-ˌbak-ˈtir-ē-əm How to pronounce archaebacterium (audio)
: any of the microorganisms comprising the archaea : archaean

Note: The archaea were originally classified with the bacteria. They have since been placed in their own domain, and use of the term archaebacterium is now typically considered outmoded.

Word History

Etymology

New Latin

First Known Use

1977, in the meaning defined above

Time Traveler
The first known use of archaebacterium was in 1977

Dictionary Entries Near archaebacterium

Cite this Entry

“Archaebacterium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/archaebacterium. Accessed 6 Dec. 2022.

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