Lewis Short
(adjective) : mĕtella, ae, f. (prob. , sc. machina)
* A basket filled with stones, which the besieged threw down on the heads of the besiegers (post-class.): ut de ligno crates facerent, quas metellas vocaverunt, lapidibusque complerent, etc. (al. metilas, medullas, metulas),Veg. Mil. 4, 6.
Charlton T. Lewis, Charles Short, A Latin Dictionary