archaebacterium

noun
ar·​chae·​bac·​te·​ri·​um | \ ˌär-kē-ˌbak-ˈtir-ē-əm How to pronounce archaebacterium (audio) \

Definition of archaebacterium

: 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.

First Known Use of archaebacterium

1977, in the meaning defined above

History and Etymology for archaebacterium

New Latin

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The first known use of archaebacterium was in 1977

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Cite this Entry

“Archaebacterium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/archaebacterium. Accessed 21 Sep. 2020.

More from Merriam-Webster on archaebacterium

Britannica.com: Encyclopedia article about archaebacterium

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