Definition of "quadric" []

• Of or relating to geometric surfaces that are defined by quadratic equations. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Markowitz also showed how the problem of actually calculating an optimum portfolio can be solved as a quadric programming problem."
• "Applied with patented quadric optics non-imaginglens, luminaire efficiency over 90%"
• "As spacing between casimir plates formed by cavities in Rayney nickel gets smaller the vacuum fluctuations and therefore any matter diffused therough them twist on the time axis trading spatial parameters for temporal but maintaining the same quadric volume."