# biquadratic

bi·quad·rat·icMath. of or involving the fourth power of a quantity

- such a quantity
- an algebraic equation of the fourth power; quartic equation

## biquadratic

*Mathematics*

adjective

Of or relating to the fourth degree.

noun

An algebraic equation of the fourth degree.

## biquadratic

Adjective

(*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.

Origin

*bi-* + *quadratic*