Pronunciation: (ō"u-gō'nē-um), [key]
—pl. -ni•aPronunciation: (-nē-u), [key] -ni•ums. Biol.
1. one of the undifferentiated germ cells giving rise to oocytes.
2. the one-celled female reproductive organ in certain thallophytes, usually a more or less spherical sac containing one or more eggs.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.