[oh-uh-gam-eet, -guh-meet]

noun Cell Biology.

one of a pair of structurally dissimilar gametes, the female gamete being large and nonmotile and the male gamete being small and motile.

Nearby words

  1. ooblast,
  2. oocyst,
  3. oocyte,
  4. oodles,
  5. oof,
  6. oogamous,
  7. oogamy,
  8. oogenesis,
  9. oogenetic,
  10. oogonium

Origin of oogamete

First recorded in 1890–95; oo- + gamete

Related formso·og·a·mous [oh-og-uh-muh s] /oʊˈɒg ə məs/, adjectiveo·og·a·my, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for oogamy



sexual reproduction involving a small motile male gamete and a large much less motile female gamete: occurs in all higher animals and some plants
Derived Formsoogamous, 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 oogamy


[ō′ə-gămēt′, -gə-mēt]


A female gamete, especially the larger of two gametes produced by an oogamous species.

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

Science definitions for oogamy



A system of sexual reproduction in which one gamete (called the egg) is large and nonmotile, while the other (called the sperm) is small and motile. Oogamy is a type of heterogamy. Compare isogamy.
Related formsoogamous adjective

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