norethisterone
/nɔːrɛˈθɪstərəʊn/Pharmacology
noun
A synthetic steroid hormone, C20H26O2, which has actions similar to those of progesterone and is used chiefly for contraception.
- Called norethindrone in the U.S..
Origin
1950s; earliest use found in Proceedings of the Society for Experimental Biology and Medicine. From nor- + ethisterone.