biquadratic

• POS: Adjective, Noun
• HYPHEN: bi=quad=rat=ic

CIDE DICTIONARY

biquadratic, a. [Pref. bi- + quadratic: cf. F. biquadratique.].

 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.

biquadratic, n. 

 A biquadrate.  [1913 Webster]