What does "ethinylestradiol" mean?

A derivative of 17β-estradiol, the major endogenous estrogen in humans, used in oral contraceptives.

How do you pronounce "ethinylestradiol"?

Pronounced //ɪˌθaɪ.nl̩ˌɛ.stɹəˈdaɪˌɔl//.

/ɪˌθaɪ.nl̩ˌɛ.stɹəˈdaɪˌɔl/ noun

noun ·Rare ·Advanced level

Noun

1
A derivative of 17β-estradiol, the major endogenous estrogen in humans, used in oral contraceptives. uncountable

From ethinyl + estradiol.