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.

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ELLIPSOID, a quadric surface whose sections are ellipses.

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

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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.

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

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