Origin of heterogamy

First recorded in 1870–75; hetero- + -gamy
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Examples from the Web for heterogamy

Historical Examples of heterogamy

British Dictionary definitions for heterogamy


  1. a type of sexual reproduction in which the gametes differ in both size and formCompare isogamy
  2. a condition in which different types of reproduction occur in successive generations of an organism
  3. the presence of both male and female flowers in one inflorescenceCompare homogamy (def. 1)
Derived Formsheterogamous, 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

heterogamy in Medicine


  1. The state or condition in which conjugating gametes are dissimilar in structure and size as well as in function.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

heterogamy in Science


  1. Alternation of sexual and parthenogenetic generations, as in the life cycles of some aphids.
  2. A reproductive system that is characterized by the fusion of gametes (called heterogametes) that are dissimilar in size and structure, such as the egg and sperm of animals.
Related formsheterogamous adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.