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Biquadratic definitions

Webster's 1828 Dictionary

BIQUADRAT'IC, n. The same as biquadrate.
BIQUADRAT'IC, a. Pertaining to the biquadratic or fourth power.
Biquadratic equation, in algebra, is an equation raised to the fourth power, or where the unknown quantity of one of the terms has four dimensions.
Biquadratic parabola, in geometry, is a curve line of the third order, having two infinite legs tending the same way.
Biquadratic root of a number, is the square root of the square root of that number. Thus the square root of 9 is 3, which is the biquadratic root of 81.

WordNet (r) 3.0 (2005)

adj
1: of or relating to the fourth power n
1: an algebraic equation of the fourth degree [syn: biquadrate, biquadratic, quartic, fourth power]
2: an equation of the fourth degree [syn: biquadratic equation, biquadratic]
3: a polynomial of the fourth degree [syn: biquadratic, biquadratic polynomial, quartic polynomial]

Merriam Webster's

adjective or noun Date: 1668 quartic

Webster's 1913 Dictionary

Biquadratic Bi`quad*rat"ic, a. [Pref. bi- + quadratic: cf. F. biquadratique.] (Math.) Of or pertaining to the biquadrate, or fourth power. Biquadratic equation (Alg.), an equation of the fourth degree, or an equation in some term of which the unknown quantity is raised to the fourth power. Biquadratic root of a number, 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.

Webster's 1913 Dictionary

Biquadratic Bi`quad*rat"ic, n. (Math.) (a) A biquadrate. (b) A biquadratic equation.



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