| 1. | Biochemistry. an estrogenic hormone, C18H22O2, produced by the ovarian follicles and found during pregnancy in urine and placental tissue. |
| 2. | Pharmacology. a commercial form of this compound, obtained from the urine of pregnant women or synthesized from ergosterol, used in the treatment of estrogen deficiency and certain menopausal and postmenopausal conditions. |
estrin es·trin (ěs'trĭn)
n.
See estrogen.
estrone es·trone (ěs'trōn')
n.
A metabolite of estradiol, commonly found in urine, having considerably less biological activity than estradiol but similar properties and uses. Also called theelin.