Io | Webster's Dictionary of the English Language

io
ĭō, interj. [ἰώ], expressing joy, I ho! huzza! hurra! io hymen hymenaee, io hymen, Plaut. Cas. 4,...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
Io
Īō, Iūs, and Īōn, Iōnis, f., = Ἰώ, a daughter of Inachus , king of Argos , beloved by Jupiter , a...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
io
iō interj..—Expressing joy, ho! huzza! hurra! io triumphe! H.—In a sudden call, holla! look! ...

An Elementary Latin Dictionary
Io moth
·- A large and handsome American moth (Hyperchiria Io), having a large, bright-colored spot on each ...

Webster's Dictionary of the English Language