quadric
/ˈkwɒdrɪk
/Geometry
adjective
(Of a surface or curve) described by an equation of the second degree.His doctorate was awarded by Leiden in 1870 for a dissertation Homography applied to the theory of quadric surfaces.
noun
A quadric surface or curve.His work in geometry included a study of conics, quadrics and projective geometry....
- The equation of the scroll of tangents of the common curve of two quadrics is due to Cayley in 1850.
- The book contains a wealth of information concerning the projective geometry of conics and quadrics.
Origin
Mid 19th century: from Latin quadra 'square' + -ic.
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