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# paraboloid

[puh-rab-uh-loid] /pəˈræb əˌlɔɪd/
noun, Geometry.
1.
a surface that can be put into a position such that its sections parallel to at least one coordinate plane are parabolas.
Origin of paraboloid
1650-1660
First recorded in 1650-60; parabol(a) + -oid
Related forms
paraboloidal
[puh-rab-uh-loid-l, par-uh-buh-] /pəˌræb əˈlɔɪd l, ˌpær ə bə-/ (Show IPA),
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for paraboloid
Historical Examples
• In this case, therefore, we shall obtain three paraboloid boundary curves, as shown in Fig. 93.

Alexander Findlay
• Behind this was a curious, paraboloid projector made up of hundreds of tiny, carefully orientated coils.

John Wood Campbell
• Also, the form of cambered surface should be a paraboloid—not arc or arc of circles.

V. E. Johnson
• If it lies at the infinity, the plane at infinity is a tangent plane, and the surface is called a paraboloid.

• The Silky Epeira also has all the elbow-room she needs; and her paraboloid is not without elegance.

J. Henri Fabre
British Dictionary definitions for paraboloid

## paraboloid

/pəˈræbəˌlɔɪd/
noun
1.
a geometric surface whose sections parallel to two coordinate planes are parabolic and whose sections parallel to the third plane are either elliptical or hyperbolic. Equations x²/a² ± y²/b² = 2cz
Derived Forms
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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paraboloid in Science
 paraboloid   (pə-rāb'ə-loid')    A surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis.
The American Heritage® Science Dictionary
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### Word Value for paraboloid

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