kappa.
The tenth letter of the Greek alphabet.
Meaning & usage
The tenth letter of the Greek alphabet.
A measurement of the sensitivity of the value of an option to changes in the implied volatility of the price of the underlying asset.
Where this word comes from
Learned borrowing from Ancient Greek κάππα (káppa), ultimately from Proto-Semitic *kapp- (“palm, hand”). Doublet of kaph.
A tortoise-like demon or imp.
Where this word comes from
From Japanese 河童 (kappa, “water imp”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.