What is "tres-tyne"

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.

n. (context zoology English) 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.