paraboloid

[ puh-rab-uh-loid ]

/ pəˈræb əˌlɔɪd /

noun Geometry.

a surface that can be put into a position such that its sections parallel to at least one coordinate plane are parabolas.

Nearby words

Compare elliptic paraboloid, hyperbolic paraboloid.

Origin of paraboloid

First recorded in 1650–60; parabol(a) + -oid

Related formspa·rab·o·loi·dal

[puh-rab-uh-loid-l, par-uh-buh-] /pəˌræb əˈlɔɪd l, ˌpær ə bə-/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for paraboloid

Behind this was a curious, paraboloid projector made up of hundreds of tiny, carefully orientated coils.
The Ultimate Weapon|John Wood Campbell
Also, the form of cambered surface should be a paraboloid—not arc or arc of circles.
The Theory and Practice of Model Aeroplaning|V. E. Johnson
The Silky Epeira also has all the elbow-room she needs; and her paraboloid is not without elegance.
The Life of the Spider|J. Henri Fabre
In this case, therefore, we shall obtain three paraboloid boundary curves, as shown in Fig. 93.
The Phase Rule and Its Applications|Alexander Findlay

If it lies at the infinity, the plane at infinity is a tangent plane, and the surface is called a paraboloid.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6|Various

British Dictionary definitions for paraboloid

paraboloid

/ (pəˈræbəˌlɔɪd) /

noun

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 x ²/ a ² ± y ²/ b ² = 2 cz

Derived Formsparaboloidal, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for paraboloid

paraboloid

[ pə-răb′ə-loid′ ]

A surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis.