Vice"roy (?), n. [F. vice-roi; pref. vice- in the place of (L. vice) + roi a king, L. rex. See Vice, prep. and Royal.]
1.
The governor of a country or province who rules in the name of the sovereign with regal authority, as the king's substitute; as, the viceroy of India.
2. Zool.
A large and handsome American butterfly (Basilarchia, ∨ Limenitis, archippus). Its wings are orange-red, with black lines along the nervures and a row of white spots along the outer margins. The larvae feed on willow, poplar, and apple trees.
© Webster 1913.