\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. (Zo["o]l.) A large and handsome American butterfly
   ({Basilarchia, or Limenitis, archippus}). Its wings are
   orange-red, with black lines along the nervures and a row
   of white spots along the outer margins. The larv[ae] feed
   on willow, poplar, and apple trees.