Proper noun.  (zoology, dated) An extensive, artificial, and heterogeneous group of animals, formerly adopted by many zoologists, which included the coelenterates, echinoderms, sponges, Bryozoa, Protozoa, etc; sometimes restricted to the Coelentera or to the Anthozoa.

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This entry was last updated on RefTopia from its source on 3/20/2012.