kahukahu
1. (noun) membrane enveloping a foetus, amnion, foetal membrane, spirit of a stillborn child.
Ka mōhio ngā Māori nei he tūrehu, he patupaiarehe, he aparangi, he atua kahukahu, kōwhiowhio (TP 1/1911:5). / These Māori perceived that they were tūrehu, patupaiarehe (fair-skinned mythical beings of human form), evil spirits, spirits of unborn children and whistling spirits.