Dictionary
ethinyl estradiol
noun
Definition of ETHINYL ESTRADIOL
: a very potent synthetic estrogen C20H24O2 used especially as an oral contraceptive
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First Known Use of ETHINYL ESTRADIOL
1939
Medical Dictionary
ethinyl estradiol
noun
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 ortho evra, ortho-novum, ortho tri-cyclen
Variants of ETHINYL ESTRADIOL
ethinyl estradiol or ethy·nyl·es·tra·di·ol \ˌeth-ə-nil-ˌes-trə-ˈdī-ˌȯl, -ˌōl\ or chiefly British ethi·nyl·oes·tra·di·ol or ethy·nyl·oes·tra·di·ol \ˌeth-ə-nil-ˌē-strə-ˈdī-ˌȯl, -ē-ˈstrad-ē-ˌȯl, -ˌōl\
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