01 n. A large, handsome American butterfly (Euphœades troilus, [or] Papilio troilus). It is black, with yellow marginal spots on the front wings…
pl.
Troili, Troiluses ((#))
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1.
A large, handsome American butterfly (Euphœades 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.(Zool.) Also: troilus butterfly