Main Entry: preg·nane·di·ol Pronunciation: -'dI-"ol Function: noun : a biologically inactive crystalline dihydroxy derivativeC21H36O2 of pregnane that is formed by reduction of progesterone and is found especially in the urine of pregnant women in the form of its glucuronide
pregnanediol preg·nane·di·ol (prěg'nān-dī'ôl) n. A steroid metabolite of progesterone that is biologically inactive; a form of the compound occurs in the urine of pregnant women.