Standard Lemma guide

RU-486

name · noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

name

Meaning 1

Synonym of mifepristone.

Definition source: English Wiktionary via Wiktextract

Topics: medicine, pharmacology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: mifepristone

Antonyms: none provided

2

noun

Meaning 2

A drug formulation containing the active agent mifepristone

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: medicine, pharmacology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

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.