noun, plural zo·a [zoh-uh] /ˈzoʊ ə/. Biology Rare.

any of the individuals of a compound organism.
any individual, or the individuals collectively, produced from a single egg.

Origin of zoon

1860–65; < New Latin zōon < Greek zôion animal
Related formszo·on·al [zoh-uh-nl] /ˈzoʊ ə nl/, adjective


a combining form meaning “animal,” “organism” of the kind specified by the initial element, often corresponding to zoological class names ending in -zoa, with -zoon used to name a single member of such a class: protozoon.

Origin of -zoon

see origin at zoon
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for zoon

Historical Examples of zoon

British Dictionary definitions for zoon


noun plural zoa (ˈzəʊə) or zoons

a less common term for zooid (def. 1)
Derived Formszoonal, adjective

Word Origin for zoon

C19: from New Latin, from Greek zōion animal; related to Greek zōē life


n combining form

indicating an individual animal or an independently moving entity derived from an animalspermatozoon

Word Origin for -zoon

from Greek zōion animal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for zoon

1864, from Greek zoion "animal" (see zoo).

Online Etymology Dictionary, © 2010 Douglas Harper

zoon in Medicine



Animal; independently moving organic unit:spermatozoon.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.