quadricn.adj.

Brit.

/ˈkwɒdrɪk/, U.S.

/ˈkwɑdrɪk/

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin quadra , -ic suffix.

Etymology: < classical Latin quadra a square (see quadra n.) + -ic suffix. Compare earlier quadratic adj., quadratic n.

Mathematics.

A. n.

An expression or surface of the second degree.

ΘΚΠ

the world > relative properties > number > algebra > [noun] > expression > the highest power of the variable > named according to this

cubical1676

cubic1799

quintic1851

quadric1854

sextic1855

octavic1856

octic1876

twelfthic1882

1854 A. Cayley in Proc. Royal Soc. 7 381 A table of the covariants of a quadric, a cubic, and a quartic.

1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) I. 215 A variable parameter, which we shall distinguish by a suffix for the species of quadric.

1900 Trans. Amer. Math. Soc. 1 461 (heading) Parametric representation of the fundamental quadric.

1957 Encycl. Brit. I. 607/2 Forms in two variables are called binary... Consider a binary quadric:—f(x) = x₁²−x₂².

2000 Trans. Amer. Math. Soc. 352 5016 Draw four lines.., and consider the pencil of quadrics..containing these lines.

B. adj.

Of the second degree; spec. (of a surface) having a Cartesian equation which is algebraic and of the second degree.quadratic is now the usual term used to describe equations of the second degree.

ΘΚΠ

the world > relative properties > number > geometry > shape or figure > [adjective] > having specific property

hypotenusal?a1560

oblique?a1560

local1673

focal1676

octantal1777

symmetrical1794

radical1848

self-conjugate1855

quadric1856

stellated1859

periphractic1881

homoeoidal1883

tridiametral1891

one-sided1893

semi-infinite1903

simplicial1913

mirror-symmetric1952

1856 A. Cayley in Philos. Trans. (Royal Soc.) 146 637 The Hessian is the discriminant of the second or quadric emanant of the quantic.

1884 Hermathena 10 166 Two of the given equations will represent quadric cones.

1953 H. Wold Demand Analysis xi. 176 Repeating the calculation of Â₂ for a few neighbouring values of a1, a2, the minimum of Â₂ is then located by approximating Â₂ by a quadric expression in a₁, a₂.

1972 M. Kline Math. Thought xxiii. 545 The quadric surfaces, e.g. sphere, cylinder, paraboloid, hyperboloid of two sheets, and ellipsoid, were of course known geometrically before 1700.

2000 Ann. Math. 152 14 The unstable set is the quadric surface of singular matrices at infinity.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	quadric
释义	quadricn.adj. Brit. /ˈkwɒdrɪk/, U.S. /ˈkwɑdrɪk/ Origin: A borrowing from Latin, combined with an English element. Etymons: Latin quadra , -ic suffix. Etymology: < classical Latin quadra a square (see quadra n.) + -ic suffix. Compare earlier quadratic adj., quadratic n. Mathematics. A. n. An expression or surface of the second degree. ΘΚΠ the world > relative properties > number > algebra > [noun] > expression > the highest power of the variable > named according to this cubical1676 cubic1799 quintic1851 quadric1854 sextic1855 octavic1856 octic1876 twelfthic1882 1854 A. Cayley in Proc. Royal Soc. 7 381 A table of the covariants of a quadric, a cubic, and a quartic. 1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) I. 215 A variable parameter, which we shall distinguish by a suffix for the species of quadric. 1900 Trans. Amer. Math. Soc. 1 461 (heading) Parametric representation of the fundamental quadric. 1957 Encycl. Brit. I. 607/2 Forms in two variables are called binary... Consider a binary quadric:—f(x) = x₁²−x₂². 2000 Trans. Amer. Math. Soc. 352 5016 Draw four lines.., and consider the pencil of quadrics..containing these lines. B. adj. Of the second degree; spec. (of a surface) having a Cartesian equation which is algebraic and of the second degree.quadratic is now the usual term used to describe equations of the second degree. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [adjective] > having specific property hypotenusal?a1560 oblique?a1560 local1673 focal1676 octantal1777 symmetrical1794 radical1848 self-conjugate1855 quadric1856 stellated1859 periphractic1881 homoeoidal1883 tridiametral1891 one-sided1893 semi-infinite1903 simplicial1913 mirror-symmetric1952 1856 A. Cayley in Philos. Trans. (Royal Soc.) 146 637 The Hessian is the discriminant of the second or quadric emanant of the quantic. 1884 Hermathena 10 166 Two of the given equations will represent quadric cones. 1953 H. Wold Demand Analysis xi. 176 Repeating the calculation of Â₂ for a few neighbouring values of a1, a2, the minimum of Â₂ is then located by approximating Â₂ by a quadric expression in a₁, a₂. 1972 M. Kline Math. Thought xxiii. 545 The quadric surfaces, e.g. sphere, cylinder, paraboloid, hyperboloid of two sheets, and ellipsoid, were of course known geometrically before 1700. 2000 Ann. Math. 152 14 The unstable set is the quadric surface of singular matrices at infinity. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.adj.1854
随便看	stageproperty stager stageress stageright stagerite stageroad stagerobber stageroom stageroute stagers stagery stages stagescene stagese stagesentiment stageset stagesetter stagesetting stageside stagesmitten stagest stagestand stagestricken stagestruck stagetrack