petrary/ˈpɛtɹəɹi/EtymologyFrom Medieval Latin petraria, from Latin petra (“stone”).petrary means A weapon used to hurl stones. Lexicurio rates it Rare gem — a strength score of 77 out of 100.nounA weapon used to hurl stones“Their boats, loaded with six months’ provisions and a petrary for shooting crucifixes, were stowed aboard.”