ballista是什么意思？

ballista

英[bə'lɪstə] 美[bə'lɪstə]

• n. （古代用以发射石弹等的）抛石机，投石器，弩炮；

例句

• Ballista: Ancient missile launcher designed to hurl long arrows or heavy Balls. 投石机: 古代投掷物体之发射器,用作发射长箭或重型球状物.

英英词典释义

• Noun
  1. medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles