noun Date: 1939 a very potent synthetic estrogen C 20 H 24 O 2 used especially as an oral contraceptive
ETHINYL ESTRADIOL
Meaning of ETHINYL ESTRADIOL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012