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Characterized by or having small motile male gametes and large nonmotile female gametes.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Biology) sexual reproduction involving a small motile male gamete and a large much less motile female gamete: occurs in all higher animals and some plants
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the union of sexually differentiated reproductive cells. — oogamous, adj.See also: Biology
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.