# quadric

[kwod-rik]Mathematics

- of the second degree (said especially of functions with more than two variables).

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- a quadric function.
- a surface such as an ellipsoid or paraboloid as defined by a second-degree equation in three real variables.

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## Origin of quadric^{}

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for quadric

### Historical Examples

#### Every plane section of a quadric surface is a conic or a line-pair.

#### Instead of a circle or sphere we may take any conic or quadric.

#### Now from a quadric equation we derive, in like manner, the notion of a complex or imaginary number such as is spoken of above.

#### Evidently the method gives for L a quadric equation, which is the “resolvent” equation in this particular case.

#### Each ray cuts its corresponding plane in a point, the locus of these points is a quadric surface.

## quadric

- having or characterized by an equation of the second degree, usually in two or three variables
- of the second degree

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- a quadric curve, surface, or function

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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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