笛卡儿 Traditional form: 笛卡兒 Pinyin (reading): Díkǎ'ér Definitions: René Descartes (1596-1650), French philosopher and author of Discours de la méthode 方法論/方法论 Characters: 笛 - bamboo flute; whistle 卡 - card, punch card; calorie 儿 - son, child Traditional characters: 笛 - bamboo flute; whistle 卡 - card, punch card; calorie 兒 - son, child