Definition of ethinyl estradiol
: a very potent synthetic estrogen C20H24O2 used especially as an oral contraceptive
First Known Use of ethinyl estradiol
Medical Definition of ethinyl estradiol
: a white crystalline very potent synthetic estrogen C20H24O2 prepared from estrone and used in combination (as with norgestrel or norethindrone) as a birth control pill or alone in the treatment of menopausal symptoms or female hypogonadism or in the palliative treatment of prostate or breast cancer—see loestrin, minastrin, nuvaring, ortho evra, ortho-novum, ortho tri-cyclen, seasonale, seasonique, yasmin, yaz
Learn More about ethinyl estradiol
Medical Dictionary: Definition of "ethinyl estradiol"
Seen and Heard
What made you want to look up ethinyl estradiol? Please tell us where you read or heard it (including the quote, if possible).