#initial-load-header-loader { visibility: hidden!important; } #initial-load-content { visibility: visible!important; } .expandable .expandable-control { display: none!important; } .expandable .expandable-content { display: block!important; visibility: visible!important; max-height: none!important; height: auto!important; }

Metazoa

[met-uh-zoh-uh]

|

noun

a zoological group comprising the multicellular animals.

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. 2019

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.
The Organism as a Whole
Jacques Loeb
In the systematic section of this work the embryological history of the Metazoa has been treated.
The Works of Francis Maitland Balfour, Volume III (of 4)
Francis Maitland Balfour
There are but few groups of the Metazoa which are not provided with optic organs of greater or less complexity.
The Works of Francis Maitland Balfour, Volume III (of 4)
Francis Maitland Balfour
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
Herbert Spencer

metazoa in Medicine

Metazoa

[mĕt′ə-zō′ə]

n.

A subdivision of the animal kingdom that includes all multicellular animal organisms having cells that are differentiated and form tissues and organs.

Related formsmet′a•zo′an adj. n.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.