1. sagitta - Noun
2. Sagitta - Proper noun
A small constellation north of Aquila; the Arrow.
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 ear bones, found in most fishes.
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 Chaetognatha.
Source: Webster's dictionaryAncient Greece Sagitta can be seen above Aquila in this plate from Urania's Mirror (1825). Source: Internet
Richard Copsey argues that the Ignea Sagitta was unknown until the early fifteenth century, raising the question whether it was ever publicly issued. Source: Internet