quadric

[ kwod-rik ]

/ ˈkwɒd rɪk /

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.

Nearby words

quadrennial, quadrennium, quadri-, quadriad, quadribasic, quadric, quadric surface, quadricentenary, quadricentennial, quadricep, quadriceps

Origin of quadric

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for quadric

Every conic which has five points in common with a quadric surface lies on the surface.
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
Every plane which cuts a quadric surface in a line-pair is a tangent plane.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6|Various
The surface itself is therefore called a quadric surface, or a surface of the second order.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6|Various

If through one point on a quadric surface no line on the surface can be drawn, then the surface contains no lines.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6|Various

British Dictionary definitions for quadric

quadric

/ (ˈkwɒdrɪk) maths /

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