designating or involving an equation whose terms are not of the first degree
nonlinear详细解释
non.lin.e.ar adj.（形容词）Not in a straight line.不在直线上的Mathematics【数学】 Occurring as a result of a nonadditive operation.非线性的：作为非可加运算的结果而产生的Containing a variable with an exponent other than one. Used of an equation.非一次的：包含有一个非一次幂的变量的，用于方程式的
