### Princeton's WordNet(0.00 / 0 votes)Rate this definition:

a curve or surface whose equation (in Cartesian coordinates) is of the second degree

### Wiktionary(0.00 / 0 votes)Rate this definition:

A surface whose shape is defined in terms of a quadratic equation

### Webster Dictionary(0.00 / 0 votes)Rate this definition:

of or pertaining to the second degree

a quantic of the second degree. See Quantic

a surface whose equation in three variables is of the second degree. Spheres, spheroids, ellipsoids, paraboloids, hyperboloids, also cones and cylinders with circular bases, are quadrics

### Freebase(0.00 / 0 votes)Rate this definition:

In mathematics, a quadric, or quadric surface, is any D-dimensional hypersurface in-dimensional space defined as the locus of zeros of a quadratic polynomial. In coordinates {x1, x2, ..., xD+1}, the general quadric is defined by the algebraic equation which may be compactly written in vector and matrix notation as: where x = {x1, x2, ..., xD+1} is a row vector, xT is the transpose of x, Q is a × matrix and P is a-dimensional row vector and R a scalar constant. The values Q, P and R are often taken to be real numbers or complex numbers, but in fact, a quadric may be defined over any ring. In general, the locus of zeros of a set of polynomials is known as an algebraic variety, and is studied in the branch of algebraic geometry. A quadric is thus an example of an algebraic variety. For the projective theory see quadric.

### Chambers 20th Century Dictionary(0.00 / 0 votes)Rate this definition:

kwod′rik, adj. (alg.) of the second degree, quadratic—esp. in solid geometry and where there are more than two variables.—n. Quad′ricone, a quadric cone.

1. acquir'd

2. Acquird

### Numerology

1. Chaldean Numerology

The numerical value of quadric in Chaldean Numerology is: 9

2. Pythagorean Numerology

The numerical value of quadric in Pythagorean Numerology is: 1

### From our Multilingual Translation Dictionary

• пове́рхность второ́го поря́дка

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