Definition

1. Noun:
   • A taxonomic division: In some biological classification systems, "division archaebacteria" is considered a kingdom-level taxonomic rank for a major group of microorganisms. These are the archaebacteria, distinct from true bacteria (eubacteria) and eukaryotes, often found in extreme environments.

Usage Examples

• Noun:
  • The division archaebacteria includes organisms that thrive in hot springs and salt lakes.
  • Scientists study the division archaebacteria to understand early life on Earth.

Advanced Usage

• In taxonomic context: The term is used in formal biological classification. While "Archaea" is now the more common and preferred domain name in the three-domain system (Archaea, Bacteria, Eukarya), "division archaebacteria" appears in older or alternative classifications where it was granted kingdom status.
  • In that textbook's classification scheme, the kingdom Monera was split into the division eubacteria and the division archaebacteria.

Variants and Related Words

• Archaea (n): The current domain name encompassing organisms formerly classified within the division archaebacteria.
• Archaebacterium (n, singular): A single organism belonging to this group.
• Archaebacterial (adj): Relating to archaebacteria.

Synonyms

• Archaeal kingdom: A synonymous phrase in taxonomic contexts.
• Kingdom Archaea: A more modern equivalent term when referring to its taxonomic rank in some systems.

Related Phrases

• "Member of the division archaebacteria": A phrase used to describe an organism's classification.
  • Methanogens are a well-known member of the division archaebacteria.

Noun

1. in some classifications considered a kingdom