τριόφθαλμος

ον
A. three-eyed, Orac. ap. Apollod. 2.8.3, Plu. 2.520c, etc.
2. ὁ τ., name of a precious stone, Plin. HN 37.186.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project