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Noun: archaebacterium (archaebacteria)
  1. Microorganisms that are evolutionarily distinct from bacteria and eukaryotes, now classified as Archaea
    "Archaebacteria can survive in extreme environments like hot springs";
    - archaebacteria, archaeobacteria, archeobacteria [N. Amer]

Derived forms: archaebacteria

Type of: moneran, moneron

Part of: division Archaebacteria

Encyclopedia: Archaebacterium