pānga tāpiripiri
1. (noun) additive relationship (maths).
He pānga tāpiripiri kei waenganui i ngā taurangi e rua e whai ake nei nā te mea ka noho pūmau te tau tāpiri i tētahi taurangi kia puta ai te taurangi tuarua (TRP 2010:194). / There is an additive relationship between the following two variables because the addend remains fixed to a particular variable so that a second variable appears.