corpus luteum corpus lu·te·um (lōō'tē-əm)
A yellow, progesterone-secreting mass of cells that forms from a Graaffian follicle after the release of a mature egg.
|corpus luteum (l'tē-əm) Pronunciation Key
Plural corpora lutea
A yellow mass of cells that forms from a mature ovarian follicle after ovulation and that secretes progesterone. If fertilization of the egg occurs, the corpus luteum persists for the first few months of pregnancy.