Lewis Short
(verb) : sŭper-năto, āre
* To swim above or on top, to float (post-Aug.), Col. 12, 9, 2; Plin. 7, 15, 13, § 65; 28, 9, 35, § 134; App. M. 6, p. 180, 36; Paul. Nol. Carm. 21, 179.— With dat.: arieti (Phryxum),App. M. 6, p. 185, 33.
Charlton T. Lewis, Charles Short, A Latin Dictionary