mŏlārĭus — Lewis & Short
mŏlārĭus, a, um, adj.id.,
I 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.