指腹為婚（指腹?fàn)?wèi)婚）　

◎ 指腹為婚 zhǐfù-wéihūn

[parental betrothal;the two (the boy and the girl) had been engaged to each other before they were born] 舊指胎兒還在母體中就由雙方父母作主訂婚