paraboloidaladj.

Brit.

/pəˌrabəˈlɔɪdl/, U.S.

/pəˌræbəˈlɔɪd(ə)l/

Origin: Formed within English, by derivation. Etymons: paraboloid n., -al suffix¹.

Etymology: < paraboloid n. + -al suffix¹.

Of the form of a paraboloid.

ΘΚΠ

the world > space > shape > curvature > curved three-dimensional shape or body > [adjective] > solid of revolution having conic section

conoidal1571

paraboloidal1825

paraboloid1831

1825 ‘J. Nicholson’ Operative Mechanic 575 Of these, the circular [domes] may be spherical, spheroidal, ellipsoidal, hyperboloidal, paraboloidal, &c.

1861 G. F. Chambers Handbk. Descr. Astron. viii. vi. 364 Using, instead of a spherical, a paraboloidal speculum.

1913 Proc. Royal Soc. 88 190 For comparison the particulars of a Newtonian of equal focal length and aperture and paraboloidal mirror are also given.

1949 S. Silver Microwave Antenna Theory & Design i. 12 Paraboloidal and parabolic reflectors are used at lower frequencies in some special cases.

1989 Nature 18 May 198/2 Consider a paraboloidal mirror used to concentrate sunlight at its focus.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	paraboloidal
释义	paraboloidaladj. Brit. /pəˌrabəˈlɔɪdl/, U.S. /pəˌræbəˈlɔɪd(ə)l/ Origin: Formed within English, by derivation. Etymons: paraboloid n., -al suffix¹. Etymology: < paraboloid n. + -al suffix¹. Of the form of a paraboloid. ΘΚΠ the world > space > shape > curvature > curved three-dimensional shape or body > [adjective] > solid of revolution having conic section conoidal1571 paraboloidal1825 paraboloid1831 1825 ‘J. Nicholson’ Operative Mechanic 575 Of these, the circular [domes] may be spherical, spheroidal, ellipsoidal, hyperboloidal, paraboloidal, &c. 1861 G. F. Chambers Handbk. Descr. Astron. viii. vi. 364 Using, instead of a spherical, a paraboloidal speculum. 1913 Proc. Royal Soc. 88 190 For comparison the particulars of a Newtonian of equal focal length and aperture and paraboloidal mirror are also given. 1949 S. Silver Microwave Antenna Theory & Design i. 12 Paraboloidal and parabolic reflectors are used at lower frequencies in some special cases. 1989 Nature 18 May 198/2 Consider a paraboloidal mirror used to concentrate sunlight at its focus. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < adj.1825
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