One of the clumps of cells that results from the breaking up of the gonadal cords in the ovarian cortex and later develops into a primary ovarian follicle.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for egg cluster
Historical Examples of egg cluster
We know the egg-cluster of the Hemerobius, the object of so many mistakes to the untrained observer.The Glow-Worm and Other Beetles
Jean Henri Fabre
Now and then he picked up an isolated insect from a limb or took an egg-cluster from a break in the bark on a trunk.The Spell of the Rockies
Enos A. Mills