The Collaborative International Dictionary
Ribaudequin
Ribaudequin \Ri*bau"de*quin\, n. [F.]
An engine of war used in the Middle Ages, consisting of a protected elevated staging on wheels, and armed in front with pikes. It was (after the 14th century) furnished with small cannon.
A huge bow fixed on the wall of a fortified town for casting javelins.
Wiktionary
ribaudequin
n. (alternative form of ribauldequin English)