quartic n 1: an algebraic equation of the fourth degree [syn: {biquadrate}, {biquadratic}, {quartic}, {fourth power}]
Quartic \Quar"tic\, n. (a) (Alg.) A quantic of the fourth degree. See {Quantic}. (b) (Geom.) A curve or surface whose equation is of the fourth degree in the variables. [1913 Webster]
Quartic \Quar"tic\, a. [L. quartus fourth.] (Mach.) Of the fourth degree. [1913 Webster]