Sagitta

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Sagitta \Sa*git"ta\, n. [L., an arrow.]
     1. (Astron.) A small constellation north of Aquila; the
        Arrow.
        [1913 Webster]
  
     2. (Arch.) The keystone of an arch. [R.] --Gwilt.


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     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.
        [Obs.]
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     4. (Anat.) The larger of the two otoliths, or ear bones,
        found in most fishes.
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     5. (Zool.) 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.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  Sagitta
       n 1: a small constellation in the northern hemisphere between
            Cygnus and Aquila and crossed by the Milky Way
       2: any arrowworm of the genus Sagitta