quadric

UK: /ˈkwɒdrɪk/ US: (kwod′rik)

WordReference Random House Unabridged Dictionary of American English © 2026

quad•ric  (kwod′rik), [Math.]
adj. 

1. Mathematics of the second degree (said esp. of functions with more than two variables).

n. 

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

• quadr- + -ic 1855–60

Collins Concise English Dictionary © HarperCollins Publishers::

quadric / ˈkwɒdrɪk/ adjective

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

noun

1. a quadric curve, surface, or function