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quatrefoil

英 ['kætrəfɒɪl] 美 ['kætəfɔɪl]

n. 四叶片之叶；四瓣花；四叶饰

英文词源

quatrefoil (n.): "flower with four leaves," early 15c., from Old French quatrefoil, from quatre "four" (see four) + foil "leaf" (see foil (n.)).