biaffine

bi- +‎ affine

biaffine (not comparable)

1. (mathematics) affine in two different ways
   • 2015, Štefan Gyürki, Mikhail Klin, “Construction of infinite families of non-Schurian association schemes of order ${\displaystyle 2p^{2}}$, ${\displaystyle p}$ an odd prime, based on biaffine planes and Heisenberg groups: research report and beyond”, in arXiv‎:

     This construction is explained using incidences between points and lines of a biaffine plane and we also provide a pure algebraic model for it with the aid of finite Heisenberg groups.