[ ahy-sog-uh-mee ]
/ aɪˈsɒg ə mi /

noun Biology.

the fusion of two gametes of similar form, as in certain algae.

Origin of isogamy

First recorded in 1890–95; iso- + -gamy Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for isogamy

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

British Dictionary definitions for isogamy


/ (aɪˈsɒɡəmɪ) /


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

Derived Forms

isogamous, 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

Medicine definitions for isogamy


[ ī-sŏgə-mē ]


Conjugation between gametes of equal size and structure, or between individual cells alike in all respects.

Related forms

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

Science definitions for isogamy


[ ī-sŏgə-mē ]

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 forms

isogamous adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.