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paraboloid

Overview page. Subjects: Astronomy and Astrophysics.

A surface swept out by a parabola rotated 360° about its axis. The main mirrors in large telescopes are usually paraboloidal in cross-section, since such mirrors are free from spherical...

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elliptic paraboloid

Overview page. Subjects: Mathematics.

A quadric whose equation in a suitable coordinate system isHere the yz-plane and the zx-plane are planes of symmetry. Sections by planes z=k, where k≥0, are ellipses (circles if a=b);...

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hyperbolic paraboloid

Overview page. Subjects: Mathematics.

A quadric whose equation in a suitable coordinate system isThe yz-plane and the zx-plane are planes of symmetry. Sections by planes parallel to the xy-plane are hyperbolas, the section by...

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paraboloid

Overview page. Subjects: Astronomy and Astrophysics.

A surface swept out by a parabola rotated 360° about its axis. The main mirrors in large telescopes are usually paraboloidal in cross-section, since such mirrors are free from spherical...

See overview in Oxford Index

paraboloid

Ian Ridpath.

in A Dictionary of Astronomy

January 2012; p ublished online January 2012 .

Reference Entry. Subjects: Astronomy and Astrophysics. 32 words.

A surface swept out by a parabola rotated 360° about its axis. The main mirrors in large telescopes are usually

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paraboloid

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 33 words.

A surface swept out by a parabola rotated 360° about its axis. The main mirrors in large telescopes are usually paraboloidal in cross-section, since such mirrors are free from ...

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paraboloid

Christopher Gorse, David Johnston and Martin Pritchard.

in A Dictionary of Construction, Surveying and Civil Engineering

January 2012; p ublished online January 2013 .

Reference Entry. Subjects: Engineering and Technology. 25 words.

A three-dimensional shape in the form of an ellipse or hyperbola, which has been created by turning a parabola around

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paraboloid

in A Dictionary of Physics

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Physics. 13 words.

A solid formed by rotating a parabola about its axis of symmetry.

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paraboloid

Edited by Richard Rennie and Jonathan Law.

in A Dictionary of Physics

March 2019; p ublished online March 2019 .

Reference Entry. Subjects: Physics. 13 words.

A solid formed by rotating a parabola about its axis of symmetry.

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paraboloid

Edited by Jonathan Law and Richard Rennie.

in A Dictionary of Physics

January 2015; p ublished online September 2015 .

Reference Entry. Subjects: Physics. 13 words.

A solid formed by rotating a parabola about its axis of symmetry.

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paraboloid

Christopher Clapham and James Nicholson.

in The Concise Oxford Dictionary of Mathematics

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Pure Mathematics. 7 words.

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paraboloid

Christopher Clapham and James Nicholson.

in The Concise Oxford Dictionary of Mathematics

January 2014; p ublished online September 2014 .

Reference Entry. Subjects: Pure Mathematics. 7 words.

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elliptic paraboloid

Christopher Clapham and James Nicholson.

in The Concise Oxford Dictionary of Mathematics

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Pure Mathematics. 87 words.

A *quadric whose equation in a suitable coordinate system is x2a2+y2b2

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hyperbolic paraboloid

Christopher Clapham and James Nicholson.

in The Concise Oxford Dictionary of Mathematics

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Pure Mathematics. 85 words.

A *quadric whose equation in a suitable coordinate system is x2a2−y2b2

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elliptic paraboloid

Christopher Clapham and James Nicholson.

in The Concise Oxford Dictionary of Mathematics

January 2014; p ublished online September 2014 .

Reference Entry. Subjects: Pure Mathematics. 88 words.

A *quadric whose equation in a suitable coordinate system is Here the yz‐plane and the zx‐plane are planes of symmetry. Sections by planes ...

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hyperbolic paraboloid

Christopher Clapham and James Nicholson.

in The Concise Oxford Dictionary of Mathematics

January 2014; p ublished online September 2014 .

Reference Entry. Subjects: Pure Mathematics. 79 words.

A *quadric whose equation in a suitable coordinate system is The yz‐plane and the zx‐plane are planes of symmetry. Sections by planes parallel to the ...

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hyperbolic paraboloid roof

Christopher Gorse, David Johnston and Martin Pritchard.

in A Dictionary of Construction, Surveying and Civil Engineering

January 2012; p ublished online January 2013 .

Reference Entry. Subjects: Engineering and Technology. 58 words.

A roof formed from a sweeping curved shape that is made up from straight lines running between sides of a

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parabola

Elizabeth Martin.

in The New Oxford Dictionary for Scientific Writers and Editors

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Language Reference. 62 words.

Adjectival form: parabolic. Derived noun: paraboloid. Adjectival form: paraboloid or paraboloidal.

A parabola is a geometric curve,

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parabolic reflector

Edited by Andrew J. Butterfield and John Szymanski.

in A Dictionary of Electronics and Electrical Engineering

June 2018; p ublished online June 2018 .

Reference Entry. Subjects: Electronic Engineering. 38 words.

A radiofrequency or microwave-frequency reflector (see directional antenna) that has a hollow concave paraboloid shape so that all

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Candela Outeriño, Félix (1910–97)

in The Oxford Companion to Architecture

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Architecture. 210 words.

His main contribution was to design thin vaulting or concrete shells, based on hyperbolic paraboloids. His most noteworthy works include

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concave

Edited by Richard Rennie and Jonathan Law.

in A Dictionary of Physics

March 2019; p ublished online March 2019 .

Reference Entry. Subjects: Physics. 84 words.

Curving inwards. A concave mirror is one in which the reflecting surface is formed from the interior surface of a sphere or paraboloid. A ...

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