trifluoperazine

noun

tri·​fluo·​per·​a·​zine ˌtrī-ˌflü-ō-ˈper-ə-ˌzēn How to pronounce trifluoperazine (audio) -zən How to pronounce trifluoperazine (audio)
: a phenothiazine tranquilizer C21H24F3N3S chiefly used to treat psychotic conditions and especially schizophrenia

Word History

Etymology

tri- + fluor- + piperazine

First Known Use

circa 1957, in the meaning defined above

Time Traveler
The first known use of trifluoperazine was circa 1957

Rhymes for trifluoperazine

See All Rhymes for trifluoperazine

Browse Nearby Words

triflingness
trifluoperazine
trifluor-
See all Nearby Words

Cite this Entry

“Trifluoperazine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trifluoperazine. Accessed 7 Jul. 2026.

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Medical Definition

trifluoperazine

noun
tri·​fluo·​per·​a·​zine ˌtrī-ˌflü-ō-ˈper-ə-ˌzēn How to pronounce trifluoperazine (audio) -zən How to pronounce trifluoperazine (audio)
: a phenothiazine tranquilizer used in the form of its hydrochloride C21H24F3N3S·HCl to treat psychotic disorders and especially schizophrenia

Note: Trifluoperazine is marketed under the trademark Stelazine.

More from Merriam-Webster on trifluoperazine

Britannica.com: Encyclopedia article about trifluoperazine

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