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

(ˈkwɒdrɪk) maths
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

(ˈkwɒd rɪk)

2. a surface such as an ellipsoid or paraboloid as defined by a second-degree equation in three real variables.
[1855–60]
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 quadric - a curve or surface whose equation (in Cartesian coordinates) is of the second degreequadric surfacecurve, curved shape - the trace of a point whose direction of motion changeshyperboloid - a quadric surface generated by rotating a hyperbola around its main axis
References in periodicals archive ?
Though each essay is independent, a few central themes emerge, namely, trigonometry, convexity, rigidity, area, volume, and the relation between non-Euclidean geometry and projective geometry, particularly in connection with conics, quadrics, and quadratic forms.
The extraction parameters of temperature, pH and solvent/material ratio, the quadrics of time, temperature and pH, and the interaction between each two of the four extraction parameters had a significant effect on the yield.
In this kind of networks, there are several types of transaction activities, such as study experiences ("graduated from Tsinghua University," "studying in Cambridge University," "was conferred doctor's degree," etc.), work experiences ("worked at Microsoft MSRA," "teaches in Central South University," etc.), publication information ("published ([mu] + [lambda]) Evolutionary Strategy for 3D Modeling and Segmentation with Super quadrics," etc.), and research experiences ("took over The Association Rules Mining of Time Series and Knowledge Discovery for Recognition of Expert Academic Activities Track project," etc.).
In this work, motivated by the effectiveness of the local representation for shaped reflectors, we explore the use of axis-displaced confocal quadrics into the numerical solution of the MA equation.
In [39] a variational mesh segmentation framework based on fitting general quadrics (including planes as a special case) is proposed.
Since [h.sup.0]([I.sub.C](2)) > 2, A is not the complete intersection of 2 quadrics and hence deg(A) = 3.
Collision Detection for Ellipsoids and other Quadrics. Doctoral Thesis, University of Hong Kong, China.
It includes natural quadrics (cylinder, cone and sphere), revolute quadrics, tori, pipes and Dupin cyclide.
where k is the number of frame examples, [[??].sub.i] represents the new vertex formed by collapsing vertices [v.sub.1] and [v.sub.2] in the ith frame example, and [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] represent the error quadrics of vertices [v.sub.1] and [v.sub.2], respectively.
Petitjean, "A survey of methods for recovering quadrics in triangle meshes," ACM Computing Surveys, vol.
In fact, the intersection of two quadrics is a question that has been studied extensively in various contexts because of its usefulness in computer aided design, solid modeling, and design of mechanical parts (see [1] and the references therein for detailed discussions of the relevant issues).

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