In mathematics, the term quartic describes something that pertains to the "fourth order", such as the function x 4 {\displaystyle x^{4}} . It may refer to one of the following: Quartic function, a polynomial function of degree 4 Quartic equation, a polynomial equation of degree 4 Quartic curve, an algebraic curve of degree 4 Quartic reciprocity, a theorem from number theory Quartic surface, a surface defined by an equation of degree 4 See also All pages with titles beginning with Quartic All pages with titles containing Quartic Quart (disambiguation) Quintic, relating to degree 5, as next higher above quartic Cubic (disambiguation), relating to degree 3 or a cube, as next lower below quartic.