Definition of "sagitta" []

• The keystone of an arch. (noun)
• 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. (noun)
• The larger of the two otoliths, or ear bones, found in most fishes. (noun)

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• "Patroclus; he was even tempted to believe with Sextus that the name iatros, medicus, was derived from ios, which in the older times signified "sagitta," and that the earliest function of our professional ancestors was the extraction of arrows and darts."
• "The sand dune deserts of Tsugar els and Altan els have Tolai hare Lepus tolai, daurian partridge Perdix dauuricae, houbara and great bustards Chlamydotis undulata and Otis tarda (VU); and the specialized species five-toed dwarf jerboa Cardiocranius paradoxus (VU) and northern three-toed jerboa Dipos sagitta."
• "One species – the Rough-legged jerboa Dipus sagitta – exhibits particularly interesting predator-avoidance behaviour: it not only leaps from predators, but, as it leaps, grabs at over-hanging foliage with its teeth and forelimbs, and then clambers into the vegetation to hide (Hanney 1975)."