- a zoological group comprising the multicellular animals.
Origin of Metazoa
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for metazoa
In general, however symbiosis is rarer in the metazoa than in the metaphyta.The Wonders of Life
Minot had tried to prove that the death of metazoa is due to the greater differentiation and specialization of their tissues.The Organism as a Whole
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.Essays: Scientific, Political, & Speculative, Vol. I
- A subdivision of the animal kingdom that includes all multicellular animal organisms having cells that are differentiated and form tissues and organs.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.