Definition of "sagitta" in English

noun

1. The keystone of an arch.

2. (geometry) 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.

3. (zootomy) The larger of the two otoliths, or earbones, found in most fishes.

4. Any arrowworm, of the genus Sagitta.