scallop shell
noun
1- a single valve from the shell of a scallop扇贝壳。
1.1
- historical a representation of this shell worn by a pilgrim as a souvenir of the shrine of St James at Santiago de Compostela in Spain〈史〉（信徒朝觐西班牙圣地亚哥圣詹姆斯教堂后佩戴的）朝圣纪念扇贝壳。