norethynodrel Pharm.
(nɔːrɛˈθɪnədrɪl)
[f. nor- + ethane + -yne + -odrel, of unknown origin.]
A synthetic hormone, C20H26O2, with actions and uses similar to those of norethisterone, with which it is isomeric.
| 1957 Endocrinology LX. 804 Norethynodrel has been examined for its ability to produce endometrial gland development in the estrogen-primed spayed or immature rabbit. 1962 New Scientist 7 June 506/3 Most contraceptive pills consist of a mixture of two steroids obtained from yams. One is norethynodrel..which is believed to inhibit ovulation. The other is an oestrogen. 1970 Passmore & Robson Compan. Med. Stud. II. xii. 6/1 Shift of the double bond in the A ring of norethisterone from the 4–5 to the 5–10 position produces the isomer, norethynodrel. |