ethinylœstradiol
(ˌɛθɪnɪlˌiːstrəˈdaɪɒl)
Also ethinyl estradiol, œstradiol.
[f. ethine + -yl + œstradiol.]
A synthetic œstrogen, C20H24O2.
| 1939 Chem. Abstr. XXXIII. 3465 (title) The action of ethinylestradiol, a derivative of follicular hormone, given by mouth. 1963 J. H. Burn Drugs, Med. & Man (ed. 2) xv. 156 A pill has now been accepted by the US Food and Drug Administration as an oral contraceptive which contains 9.85 milligrams of norethynodrel, and 0.15 milligram of an oestrogen ethinyl oestradiol 3-methyl ether. 1964 L. Martin Clinical Endocrinol. (ed. 4) viii. 244 Ethinyl œstradiol is a modification of the natural hormone. Ibid. 253 Norethisterone given with ethinylœstradiol to maintain the endometrium. |