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, ∨ Papilio, troilus). It is black, with yellow marginal spots on the front wings, and blue spots on the rear wings.
© Webster 1913.