# RU-486

> English word · Proper noun

## Definitions
1. Synonym of mifepristone.

## Etymology
Roussel+UCLAF+486, from Usines Chimiques des Laboratoires Français. From French RU-486. From the codename RU-38486, the 38,486th compound synthesized by Roussel-Uclaf; then shortened to RU-486.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/ru-486