Lewis Short
(adjective) : mŏlārĭus, a, um, id.
* Of or belonging to a mill or to grinding, mill- (anteclass.): asinus molarius,a mill-ass, an ass that turns a mill,Cato, R. R. 11, 4; Varr. R. R. 1, 19, 3.
Charlton T. Lewis, Charles Short, A Latin Dictionary