Pronunciation: (ō'u-sīt"), [key]
—n. Cell Biol.
an immature egg cell of the animal ovary; in humans, one oocyte matures during the menstrual cycle, becoming an ootid and then an ovum, while several others partially mature and then disintegrate.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.