# norethisterone

> English word · Noun · IPA /nɔː.ɹɛˈθɪ.stə.ɹəʊn/

## Definitions
1. A synthetic steroid hormone, 19-nor-17α-ethynyltestosterone (C₂₀H₂₆O₂), which has actions similar to those of progesterone and is used chiefly for contraception.

## Etymology
From nor- + ethisterone.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/norethisterone