Organism
prokaryote Audio
pro·kar·y·ote [ proh-kar-ee-oht, -ee-uh t ]
Subclass of:
Cells
Definitions related to prokaryote:
  • Cells such as those of bacteria and the blue green algae which lack a true nucleus or nuclear membrane so that the nuclear material is either scattered in the cytoplasm or collected in a nucleoid region.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • Organisms without a cell nucleus or any other membrane-bound organelles. Most prokaryotes are bacteria but the group includes both the Bacteria and the Archaea. Eukaryota, Bacteria, and Archaea are now considered the top nodes of a three-domain taxonomy system.
    NCI
    U.S. National Cancer Institute, 2021
  • (prokaryotic cells) Cells lacking a nuclear membrane so that the nuclear material is either scattered in the cytoplasm or collected in a nucleoid region.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.