metazoan

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English[edit]

Etymology[edit]

Metazoa +‎ -an

Noun[edit]

metazoan (plural metazoans)

  1. (zoology) Any animal that undergoes development from an embryo stage with three tissue layers, namely the ectoderm, mesoderm, and endoderm. The term applies to all animals except the sponges.
  2. (zoology) Any animal that is multicellular.

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Adjective[edit]

metazoan (not comparable)

  1. Having to do with animals that develop from an embryo with three tissue layers.
  2. Having to do with animals that are multicellular.

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