蜕 ㄊㄨㄟ ˋ tuì 皮 ㄆㄧ ˊ pí 蛻 ㄊㄨㄟ ˋ tuì 皮 ㄆㄧ ˊ pí skin cast off during molting exuvium to pupate to molt to slough to cast off an old skin or shell