Source : Webster's Revised Unabridged Dictionary (1913)

Tres-tyne \Tres"-tyne`\, n. [L. tris, tres, three + E. tyne.]
   (Zo["o]l.)
   In the antler of a stag, the third tyne above the base. This
   tyne appears in the third year. In those deer in which the
   brow tyne does not divide, the tres-tyne is the second tyne
   above the base. See Illust. under {Rucervine}, and under
   {Rusine}.