norethindrone

noun

nor·eth·in·drone ˌnȯr-ˈe-thən-ˌdrōn

: a synthetic progestational hormone C₂₀H₂₆O₂ used in birth control pills often in the form of its acetate

Example Sentences

Recent Examples on the Web Have had a serious allergic reaction to elagolix, estradiol, norethindrone acetate, or any of the ingredients in ORIAHNN. —

Noel Mumford, Essence, 27 May 2021 A few months later, the team synthesized a hormone known as norethindrone, which was originally intended to help pregnant women avoid miscarriages. —

Steve Marble, latimes.com, 27 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'norethindrone.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

nor- + ethinyl + hydr- + -one (as in progesterone)

First Known Use

1958, in the meaning defined above

Time Traveler

The first known use of norethindrone was in 1958

See more words from the same year

Cite this Entry

Style

“Norethindrone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/norethindrone. Accessed 29 Mar. 2023.

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Medical Definition

norethindrone

noun

nor·eth·in·drone nȯr-ˈeth-ən-ˌdrōn, ˌnȯr-eth-ˈin-

: a synthetic progestational hormone C₂₀H₂₆O₂ used in birth control pills often in the form of its acetate C₂₂H₂₈O₃ see loestrin, minastrin, ortho-novum