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[oh-uh-goh-nee-uh m] /ˌoʊ əˈgoʊ ni əm/
noun, plural oogonia
[oh-uh-goh-nee-uh] /ˌoʊ əˈgoʊ ni ə/ (Show IPA),
oogoniums. Biology.
one of the undifferentiated germ cells giving rise to oocytes.
the one-celled female reproductive organ in certain thallophytes, usually a more or less spherical sac containing one or more eggs.
Origin of oogonium
From New Latin, dating back to 1865-70; See origin at oo-, -gonium
Related forms
oogonial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for oogonium


noun (pl) -nia (-nɪə), -niums
an immature female germ cell forming oocytes by repeated divisions
a female sex organ of some algae and fungi producing female gametes (oospheres)
Derived Forms
oogonial, 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
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oogonium in Medicine

oogonium o·o·go·ni·um (ō'ə-gō'nē-əm)
n. pl. o·o·go·ni·ums or o·o·go·ni·a (-nē-ə)
The primitive egg mother cell from which the oocytes develop.

o'o·go'ni·al (-nē-əl) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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oogonium in Science
Plural oogonia or oogoniums
  1. A female reproductive structure in certain algae and fungi. It is usually a rounded cell or sac containing one or more oospheres.

  2. A cell that arises from a primordial germ cell and differentiates into an oocyte in the ovary of female animals.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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