2. Happening once in twenty years; as, a vicennial celebration.

VICE-REGAL
Vice`-re"gal, a.

Defn: Of or pertaining to a viceroy or viceroyalty. Macaulay.

VICEROY Vice"roy, n. Etym: [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. (Zoöl.)

Defn: 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 larvæ feed on willow, poplar, and apple trees.

VICEROYALTY
Vice*roy"al*ty, n.

Defn: The dignity, office, or jurisdiction of a viceroy.

VICEROYSHIP
Vice"roy*ship, n.