(Latin cumulus = a little mound G. oon = egg + phorus = bearing) part of the wall of an ovarian follicle surrounding and carrying the ovum (oocyte). (More? Week 1 Notes)
cumulus - a little mound; Gr. oophoros - bearing eggs]. A thickening of follicular cells that encloses the ovum and projects from the stratum granulosum into the antrum.
At one part of the mature follicle the cells of the membrana granulosa are collected into a mass which projects into the cavity of the follicle. This is termed the cumulus oophorus (or discus proligerus), and in it the ovum is imbedded.