Origin of isogamy

First recorded in 1890–95; iso- + -gamy Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for isogamy

Historical Examples of isogamy

  • The gametes show every gradation from complete similarity (isogamy) to a condition like that of Cutleria.

British Dictionary definitions for isogamy


  1. (in some algae and fungi) sexual fusion of gametes of similar size and formCompare heterogamy (def. 1)
Derived Formsisogamous, adjective
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

isogamy in Medicine


  1. Conjugation between gametes of equal size and structure, or between individual cells alike in all respects.
Related formsi•soga•mous adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

isogamy in Science


  1. A reproductive system characterized by the fusion of gametes (called isogametes) that are not distinguished in size or structure. Isogamy is found in some algae and other protist groups. Compare heterogamy.
Related formsisogamous adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.