quadric

名词 quadric:

1. a curve or surface whose equation (in Cartesian coordinates) is of the second degree
   同义词：quadric surface

quad.ric

adj.Mathematics （形容词）【数学】
Of or relating to geometric surfaces that are defined by quadratic equations.
二次曲面的：由二次方程式所定义的几何平面的，或与其有关的