quadric

[kwod-rik]Mathematics

adjective

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

noun

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

Origin of quadric

First recorded in 1855–60; quadr- + -ic

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

Examples from the Web for quadric

Historical Examples of quadric

Every plane section of a quadric surface is a conic or a line-pair.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6
Various
Instead of a circle or sphere we may take any conic or quadric.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6
Various
Now from a quadric equation we derive, in like manner, the notion of a complex or imaginary number such as is spoken of above.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7
Various
Evidently the method gives for L a quadric equation, which is the “resolvent” equation in this particular case.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7
Various
Each ray cuts its corresponding plane in a point, the locus of these points is a quadric surface.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6
Various

British Dictionary definitions for quadric

quadric

adjective

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

noun

a quadric curve, surface, or function

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012