quadric definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Math. of the second degree: used of a function with more than two variables
Origin: ; from Classical Latin quadra, a square (akin to quattuor, four) plush -ic
a quantic of the second degree
quadric definition by American Heritage Dictionary
Of or relating to geometric surfaces that are defined by quadratic equations.