Definition of quadric in English:

quadric

adjective

Geometry
  • (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

Geometry
  • A quadric surface or curve.

    • ‘The equation of the scroll of tangents of the common curve of two quadrics is due to Cayley in 1850.’
    • ‘He also published a number of papers on the cubic surface, studying lines on the surface, and other topics such as the Schur quadric.’
    • ‘His work in geometry included a study of conics, quadrics and projective geometry.’
    • ‘The book contains a wealth of information concerning the projective geometry of conics and quadrics.’

Origin

Mid 19th century: from Latin quadra square + -ic.

Pronunciation:

quadric

/ˈkwädrik/