Any arrowworm of the genus Sagitta

• A small constellation in the northern hemisphere between Cygnus and Aquila and crossed by the Milky Way
• The Arrow constellation
• Constellation between Cygnus and Aquila

Wikipedia Word definitions in Wikipedia
Sagitta is a dim but distinctive constellation in the northern sky. Its name is Latin for " arrow ", and it should not be confused with the larger constellation Sagittarius , the archer. Although Sagitta is an ancient constellation, it has no star brighter ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Sagitta \Sa*git"ta\, n. [L., an arrow.] (Astron.) A small constellation north of Aquila; the Arrow. (Arch.) The keystone of an arch. [R.] --Gwilt. (Geom.) The distance from a point in a curve to the chord; also, the versed sine of an arc; -- so called from ...