• synonyms


  1. a zoological group comprising the multicellular animals.
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Origin of Metazoa

From New Latin, dating back to 1870–75; see origin at meta-, -zoa
Related formsmet·a·zo·an, adjective, nounmet·a·zo·ic, met·a·zo·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for metazoa

Historical Examples of metazoa

  • In general, however symbiosis is rarer in the metazoa than in the metaphyta.

    The Wonders of Life

    Ernst Haeckel

  • Minot had tried to prove that the death of metazoa is due to the greater differentiation and specialization of their tissues.

  • In the systematic section of this work the embryological history of the Metazoa has been treated.

  • There are but few groups of the Metazoa which are not provided with optic organs of greater or less complexity.

  • These are presented to us when we study the early stages in the development of the embryos of the Metazoa in general.

metazoa in Medicine


  1. A subdivision of the animal kingdom that includes all multicellular animal organisms having cells that are differentiated and form tissues and organs.
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Related formsmet′a•zoan adj. n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.