Source : Webster's Revised Unabridged Dictionary (1913)

Trygon \Try"gon\ (tr[imac]"g[o^]n), n. [L., a sting ray, from
   Gr.? a kind of fish with a prickle in the tail.] (Zo["o]l.)
   Any one of several species of large sting rays belonging to
   {Trygon} and allied genera.