表    妹    [a daughter of father's sister or of mother's brother or sister,who is younger than oneself] 姑母、舅舅、姨母的女儿中比自己(说话人)年轻者

父亲的姐妹的女儿中较某人年轻的即是其表妹。亲戚关系。母亲的兄弟或者姐妹的女儿中较某人年轻的亦是其表妹。父亲的兄弟的女儿中较某人年轻的即是其堂妹。

Younger female cousin

表里受敌    表里为奸    表里相依    表里一致    表里相济