quadric surface

noun

1. a three-dimensional surface whose equation is a quadratic equation.

Word History and Origins

Origin of quadric surface¹

First recorded in 1880–85

Example Sentences

The surface itself is therefore called a quadric surface, or a surface of the second order.

From Project Gutenberg

ELLIPSOID, a quadric surface whose sections are ellipses.

From Project Gutenberg

The diameter of a quadric surface is a line at the extremities of which the tangent planes are parallel.

From Project Gutenberg

The tangent plane to a quadric surface either cuts the surface in two lines, or it has only a single line, or else only a single point in common with the surface.

From Project Gutenberg

The following propositions follow:— A quadric surface has at every point a tangent plane.

From Project Gutenberg