NORETHYNODREL Definition & Meaning

norethynodrel

[ nawr-uh-thahy-nuh-druhl, naw-reth-uh-nuh-drel ]

Phonetic (Standard)IPA

Pharmacology.

a progestin, C 2 0 H 2 6 O 2 , used in combination with an estrogen in some oral contraceptives.

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1955–60; nor- + ethyn(yl) , components of 2 versions of its chemical name + -odrel, of uncertain derivation

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Examples have not been reviewed.

Both norethindrone and norethynodrel provided synthetic counterparts of progesterone that overcame that limitation.

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One of the steps in the syntheses for preparing norethynodrel resulted in the formation of the potent estrogen mestranol as a very minor byproduct.

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