Troilus \Tro"i*lus\, n.; pl. L. {Troili}, E. {Troiluses}. [NL.,
fr. L. Troilus, Gr. ?, the son of Priam.] (Zool.)
A large, handsome American butterfly ({Euph[oe]ades troilus},
or {Papilio troilus}). It is black, with yellow marginal
spots on the front wings, and blue spots on the rear wings;
-- also called {troilus butterfly}.
[1913 Webster]