kōpū whāngai
1. (noun) surrogate.
Ko te kōpū whāngai: Ka hapū te wahine mā te rautātea, mā te whakauru kukune rānei, hei whakawhānau pēpi mā tētahi atu (RP 2009:265). / Surrogate: Conception through artificial insemination or embryo insertion in order for a woman to give birth for someone else (RP 2009:266).