• synonyms


[het-uh-rog-uh-muh s]
  1. Genetics. having unlike gametes, or reproducing by the union of such gametes (opposed to isogamous).
  2. Botany. having flowers or florets of two sexually different kinds (opposed to homogamous).
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Origin of heterogamous

First recorded in 1830–40; hetero- + -gamous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for heterogamous

Historical Examples

  • Heterogamous, bearing two or more sorts of flowers in one cluster.

    The Elements of Botany

    Asa Gray

heterogamous in Medicine


  1. Relating to heterogamy.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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