Source : Webster's Revised Unabridged Dictionary (1913)

Arrowheaded \Ar"row*head`ed\, a.
   Shaped like the head of an arrow; cuneiform.

   {Arrowheaded characters}, characters the elements of which
      consist of strokes resembling arrowheads, nailheads, or
      wedges; -- hence called also nail-headed, wedge-formed,
      cuneiform, or cuneatic characters; the oldest written
      characters used in the country about the Tigris and
      Euphrates, and subsequently in Persia, and abounding among
      the ruins of Persepolis, Nineveh, and Babylon. See
      {Cuneiform}.