/ay kyooh"/ ; Fr. /ay kyuu"/ , n. , pl. écus /ay kyoohz"/ ; Fr. /ay kyuu"/ .
1. the shield carried by a mounted man-at-arms in the Middle Ages.
2. any of various gold and silver coins of France, issued from the 13th through the 18th centuries, bearing the figure of a shield.
[ 1695-1705; escu scutum shield ]