noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any primitive bacteria-like organism in the kingdom Archaea.
2. 2
   considered ancient life forms that evolved separately from bacteria and blue-green algae wordnet

Synonyms

All synonyms

archaebacteriaarchaebacteriaarchaeobacteriaarchaeonarchaeonarcheobacteria

Etymology

From Ancient Greek ἀρχαῖος (arkhaîos, “ancient”) and bacteria.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.