'Biquadratic equation' definitions:
Definition of 'biquadratic equation'
From: WordNet
noun
An equation of the fourth degree [syn: biquadratic equation, biquadratic]
Definition of 'Biquadratic equation'
From: GCIDE
- Biquadratic \Bi`quad*rat"ic\, a. [Pref. bi- + quadratic: cf. F. biquadratique.] (Math.) Of or pertaining to the biquadrate, or fourth power. [1913 Webster]
- 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. [1913 Webster]