Překlad "biquadratic" do čeština

(mathematics) Of a polynomial expression, involving only the second and fourth powers of a variable, as x ⁴ + 3 x ² + 2. Sometimes extended to any expression involving the fourth power of variable (but no higher powers), as x ⁴ − 4 x ³ + 3 x ² − x + 1. [..]