adjective. Of or relating to the fourth degree.

noun. An algebraic equation of the fourth degree.

Containing or referring to a fourth power, or the square of a square; quartic.

noun. In mathematics, the fourth power, arising from the multiplication of a square number or quantity by itself.

noun. A biquadrate.

noun. A biquadratic equation.

adjective. Of or pertaining to the biquadrate, or fourth power.

adjective. an equation of the fourth degree, or an equation in some term of which the unknown quantity is raised to the fourth power.

adjective. the square root of the square root of that number. Thus the square root of 81 is 9, and the square root of 9 is 3, which is the biquadratic root of 81. Hutton.

adjective. Of a polynomial expression, involving only the second and fourth powers of a variable, as x4 + 3x2 + 2. Sometimes extended to any expression involving the fourth power of variable (but no higher powers), as x4 − 4x3 + 3x2 − x + 1.

noun. A biquadratic equation.

noun. an equation of the fourth degree

adjective. of or relating to the fourth power

noun. an algebraic equation of the fourth degree

noun. a polynomial of the fourth degree

"He however extended and developed it, and after his pupil Ferrari had discovered the solution of the biquadratic equation by means of the cubic, he felt justified in publishing it."

biquadratic equation  biquadratic function  biquadratic parabola  biquadratic root  

quadratic  quartic  

equation  multinomial  number  polynomial  

biquadrate