- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for oogonia
They are reproduced by means of antheridia and oogonia developed in conceptacles, clustered together at the apex of the branches.Sea-Weeds, Shells and Fossils
De Bary has claimed for the oogonia in Cystopus and Peronospora a kind of fecundation which deserves mention here.Fungi: Their Nature and Uses
Mordecai Cubitt Cooke
These escape and float passively away when the wall of the oogonia ruptures.The Sea Shore
William S. Furneaux
Sexual reproduction by oogonia and antheridia; asexual reproduction by zoospores or conidia.
Mycelium present; antheridia but no antherozoids; oogonia with one or more oospheres: Peronosporaceae, Saprolegniaceae.
- an immature female germ cell forming oocytes by repeated divisions
- a female sex organ of some algae and fungi producing female gametes (oospheres)
- The primitive egg mother cell from which the oocytes develop.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- 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.