Lewis Short
(adjective) : quādrŭpĕdus (quādrĭpĕdus, Front. ad M. Anton. Or. 1), a, um, quadrupes
* Going on four feet, galloping (postAug.): quadrupedo gradu repentes,on all fours,Amm. 14, 2, 2: quadripedo cursu,on a gallop,Front. 1, 1.— Absol.: quadrupedo currere,to gallop,Front. Ep. ad M. Caes. 2, 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary