norethisterone

English

Chemical structure of norethisterone

Alternative forms

• norethindrone (US)

Etymology

From nor- +‎ ethisterone.

Pronunciation

• (Received Pronunciation) IPA^(key): /nɔː.ɹɛˈθɪ.stə.ɹəʊn/
• (General American) IPA^(key): /ˌnɔɹ.əˈθɪ.stəˌɹoʊn/

Noun

norethisterone (uncountable)

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

References

• “norethisterone”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “norethindrone”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.