sagitta.
The keystone of an arch.
Meaning & usage
The keystone of an arch.
The distance from a point in a curve to the chord; also, the versed sine of an arc; so called from its resemblance to an arrow resting on the bow and string.
The larger of the two otoliths, or earbones, found in most fishes.
Any arrowworm, of the genus Sagitta.
Where this word comes from
Borrowing from Latin sagitta (“an arrow, shaft, bolt”).
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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.