polyquadratic

From poly- +‎ quadratic.

polyquadratic (not comparable)

1. (mathematics) Involving multiple quadratic equations or functions
   • 2015, Francesc Fité, Xavier Guitart, “Fields of definition of elliptic ${\displaystyle k}$-curves and the realizability of all genus 2 Sato--Tate groups over a number field”, in arXiv‎:

     If ${\displaystyle E}$ does not have complex multiplication (CM), by results of Ribet and Elkies concerning fields of definition of elliptic ${\displaystyle \mathbb {Q} }$-curves ${\displaystyle E}$ is isogenous to a curve defined over a polyquadratic extension of ${\displaystyle \mathbb {Q} }$.