quadric


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quad·ric

 (kwŏd′rĭk)
adj.
Of or relating to geometric surfaces that are defined by quadratic equations.

quadric

(ˈkwɒdrɪk) maths
adj
1. (Mathematics) having or characterized by an equation of the second degree, usually in two or three variables
2. (Mathematics) of the second degree
n
(Mathematics) a quadric curve, surface, or function

quad•ric

(ˈkwɒd rɪk)

adj. n.
2. a surface such as an ellipsoid or paraboloid as defined by a second-degree equation in three real variables.
[1855–60]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.quadric - a curve or surface whose equation (in Cartesian coordinates) is of the second degree
curve, curved shape - the trace of a point whose direction of motion changes
hyperboloid - a quadric surface generated by rotating a hyperbola around its main axis
References in periodicals archive ?
Quadric curve changes were observed in Sphaerochaeta and Ruminobacter genus ([P.
2) the mathematical description has been made in the form of quadric equations system by Lagrange.
OG(2,2n)] and that the even-dimensional quadric [Q.
Among the topics are compact moduli spaces of surfaces of general type, the geometry of the ball quotient model of the moduli space for genus four curves, restrictions of stable bundles, the splitting principles and singularities, and spaces of sections of quadric surface fibrations over curves.
Among specific topics are finite focal-spreads, subgeometries from focal-spreads, the ubiquity of subgeometry partitions, hyperbolic fibrations and partial flocks, parallelisms of quadric sets, regular parallelisms, parallelisms over ordered fields, and transitive deficiency one.
Corporate culture, customer orientation, and innovativeness in Japanese firms: A quadric analysis.
There are several distance formulas for measuring the similarities of color histograms, like: the Euclidean distance, the histogram intersection or the histogram quadric distance.
The Linear, quadric and cubic functional forms were estimated and the one with the best fit was selected and used for interpreting the phenomenon.
According to Hardy, an irregular surface may be approximated to any desired degree of exactness by the summation of regular surfaces, particularly in quadric forms.
But these previous experiments in quadric surfaces perversely reappeared in derelict fashion: The glossy polycarbonate curve of Philippe Starck's Ero/s/ Chair, 2001, for Kartell, now upturned and deposited atop Geschwister (Brothers and Sisters), 2004, seemed like so much modernist design on layaway.
These let light in, allowing them to grow naturally into a quadric ellipsoidal shape, to give it its technical name.