Trebuchet

n.	1.	A cucking stool; a tumbrel.
	2.	A military engine used in the Middle Ages for throwing stones, etc. It acted by means of a great weight fastened to the short arm of a lever, which, being let fall, raised the end of the long arm with great velocity, hurling stones with much force.
	3.	A kind of balance for weighing.

Noun

1.

trebuchet - medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles Synonyms: arbalest, arbalist, ballista, bricole, mangonel, onager, trebucket, catapult

arbalest, arbalist, artillery, ballista, bricole, catapult, gun, heavy weapon, mangonel, onager, ordnance, trebucket