Definition of norethynodrel in English:

norethynodrel

(also noretynodrel)

noun

Pharmacology
  • A synthetic steroid hormone with actions similar to those of progesterone, used chiefly in combination with oestrogen in oral contraceptives; (17α)-17-hydroxy-19-norpregn-5(10)-en-20-yn-3-one, C₂₀H₂₆O₂. [Noretynodrel is the Recommended International Nonproprietary Name (rINN) of the compound.]

Origin

1950s; earliest use found in Endocrinology. From nor- + ethyn- + -odrel (of unknown origin).

Pronunciation

norethynodrel

/ˌnɔːrɛˈθʌɪnədrɛl/