kappa

noun
kap·pa | \ˈka-pə \

Definition of kappa 

: the 10th letter of the Greek alphabet — see Alphabet Table

Examples of kappa in a Sentence

Recent Examples on the Web

By activating only the kappa receptor, the chemical shouldn’t cause any of the side effects associated with the mu. Jonathon Keats, Discover Magazine, "Building a Better Painkiller," 11 May 2018 These receptors come in three flavors: mu, delta and kappa. Jon Kelvey, Smithsonian, "America’s Long-Overdue Opioid Revolution Is Finally Here," 13 Jan. 2017

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

First Known Use of kappa

15th century, in the meaning defined above

History and Etymology for kappa

Middle English, from Greek, of Semitic origin; akin to Hebrew kaph

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Dictionary Entries near kappa

kapok oil

Kaposi's sarcoma

kapote

kappa

kapparah

kappie

kapu

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Time Traveler for kappa

The first known use of kappa was in the 15th century

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More Definitions for kappa

kappa

noun
kap·pa | \ˈkap-ə \

Medical Definition of kappa 

: a cytoplasmic factor in certain paramecia that mediates production of paramecin and thereby makes the medium in which such microorganisms are grown toxic to members of strains not possessing the factor — see paramecin

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a state of commotion or excitement

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