单词	ethinyl estradiol
释义	ethinyl estradiol noun : a very potent synthetic estrogen C20H24O2 used especially as an oral contraceptive Example Sentences Recent Examples on the Web Taytulla, also called ethinyl estradiol, gained Food and Drug Administration approval in 2013. Austen Hufford, WSJ, 29 May 2018 Tyler’s experiments looked at one type of synthetic estrogen: ethinyl estradiol, or EE2, which is found in oral contraceptives like TriNessa and Seasonique. Becky Little, Smithsonian, 31 July 2017 One environmental estrogen is ethinyl estradiol—a chemical found in birth control pills. National Geographic, 3 Feb. 2016 Word History First Known Use 1938, in the meaning defined above Medical Definition ethinyl estradiol noun variants or ethynylestradiol ˌeth-ə-nil-ˌes-trə-ˈdī-ˌȯl  -ˌōl  or chiefly British ethinyloestradiol or ethynyloestradiol ˌeth-ə-nil-ˌē-strə-ˈdī-ˌȯl  -ē-ˈstrad-ē-ˌȯl  -ˌōl : 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
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