/mi drok'see proh jes"teuh rohn'/ , n. Pharm.
a progesterone derivative, C 24 H 34 O 4 , used in the treatment of abnormal uterine bleeding and secondary amenorrhea, as a contraceptive of long duration, and in the treatment of certain cancers.
[ ME(THYL) + (HY)DROXY- + PROGESTERONE ]