Ethinylestradiol

//ɪˌθaɪ.nl̩ˌɛ.stɹəˈdaɪˌɔl// noun

noun ·Rare ·Advanced level

Definitions

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

Etymology

From ethinyl + estradiol.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.