[ oh-uh-goh-nee-uh m ]
/ ˌoʊ əˈgoʊ ni əm /

noun, plural o·o·go·ni·a [oh-uh-goh-nee-uh] /ˌoʊ əˈgoʊ ni ə/, o·o·go·ni·ums. 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.

Nearby words

  1. oogamete,
  2. oogamous,
  3. oogamy,
  4. oogenesis,
  5. oogenetic,
  6. ooh,
  7. ookinesis,
  8. ookinete,
  9. ookpik,
  10. oolachan

Origin of oogonium

From New Latin, dating back to 1865–70; see origin at oo-, -gonium

Related formso·o·go·ni·al, adjective

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

Examples from the Web for oogonia

British Dictionary definitions for oogonia


/ (ˌəʊəˈɡəʊnɪəm) /

noun plural -nia (-nɪə) or -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 Formsoogonial, 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 oogonia


[ ō′ə-gōnē-əm ]

n. pl. o•o•go•ni•ums

The primitive egg mother cell from which the oocytes develop.
Related formso′o•goni•al (-nē-əl) adj.

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

Science definitions for oogonia


[ ō′ə-gōnē-əm ]

Plural oogonia oogoniums

A female reproductive structure in certain algae and fungi. It is usually a rounded cell or sac containing one or more oospheres.
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.