Lewis Short
(verb) : con-glăcĭo, no
* Perf., ātum, 1, and a. (very rare).
* Neutr., to turn entirely to ice, to freeze up.
* Prop.: aqua neque conglaciaret frigoribus, neque nive pruinaque concresceret, * Cic. N. D. 2, 10, 26.
* Act., to cause to freeze up: conglaciantur aquae,Albin. 2, 101: conglaciato imbre,Plin. 2, 60, 61, § 152.
Charlton T. Lewis, Charles Short, A Latin Dictionary