## EnglishEdit

### EtymologyEdit

### AdjectiveEdit

**biquadratic** (*not comparable*)

- (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 biquadrate or fourth power (but no higher powers), as*x*^{4}− 4*x*^{3}+ 3*x*^{2}−*x*+ 1.

### NounEdit

**biquadratic** (*plural* **biquadratics**)

- (mathematics) A
**biquadratic**equation.