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Definition of norethynodrel in English:
norethynodrel
(also noretynodrel)
noun
PharmacologyA 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, C₂₀ H₂₆ O₂.
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.
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