metazoan definition

  • noun:
    • A multicellular pet for the subkingdom Metazoa, a division regarding the pet kingdom in conventional two-kingdom category methods.
    • Any animal that undergoes development from an embryo phase with three structure levels, particularly the ectoderm, mesoderm, and endoderm. The term applies to all animals except the sponges.
    • the Metazoa.
    • a part regarding the Metazoa; a metazoön.
    • any animal for the subkingdom Metazoa; all pets except protozoans and sponges
  • adjective:
    • relating to creatures that develop from an embryo with three tissue levels.
  • others:
    • Of or related to the Metazoa.

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