Clio | Webster's Dictionary of the English Language

Clio
Clīo, ūs, f., = Κλειώ. I The Muse of history : Clio Cliusque sorores, Ov. A. A. 1, 27; Hor. C. 1...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
Clio
Clīō ūs, f , Κλείω, the muse of History, H., O., Iu.—A daughter of Oceanus, V. ...

An Elementary Latin Dictionary