Standard Lemma guide

norethisterone

noun · 1 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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  • Received-Pronunciation: /nɔː.ɹɛˈθɪ.stə.ɹəʊn/
  • General-American: /ˌnɔɹ.əˈθɪ.stəˌɹoʊn/

1

noun

Meaning 1

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

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

From nor- + ethisterone.