‖Sa‐git″ta (?), n. 1. (Astron.) A small constellation north of Aquila; the Arrow.
2. (Arch.) The keystone of an arch. Gwilt.
3. (Geom.) 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.
4. (Anat.) The larger of the two otoliths, or ear bones, found in most fishes.
5. (Zoöl.) A genus of transparent, free-swimming marine worms having lateral and caudal fins, and capable of swimming rapidly. It is the type of the class Chætognatha.