A small secretory cavity, sac, or gland, in particular:
A parasitic mite which burrows into the hair follicles, causing demodectic mange
A fluid-filled structure in the mammalian ovary within which an ovum develops prior to ovulation
Another term for Graafian follicle.
A hormone secreted by the anterior pituitary gland which promotes the formation of ova or sperm
The sheath of cells and connective tissue which surrounds the root of a hair