follow Dictionary.com

Today's Word of the Day means...

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
1650-1660
1650-60; parabol(a) + -oid
Related forms
paraboloidal
[puh-rab-uh-loid-l, par-uh-buh-] /pəˌræb əˈlɔɪd l, ˌpær ə bə-/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
Examples for paraboloid
  • The ideal concentrator shape is a paraboloid of revolution.
  • Both these factors the form of a frustum of a paraboloid, then the equations can affect displacement.
  • The density profile for a typical experimental condensate is thus an inverted paraboloid when the confining potential is harmonic.
  • The paraboloid shape is perfect for focusing the sunlight on the tube.
  • It is preferable to use a cardioid condenser rather than a paraboloid condenser for darkfield fluorescent microscopy.
  • The antennas are high-gain, circular cross-section paraboloid reflectors or conical horn reflectors and are highly collimating.
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
paraboloidal, 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
Cite This Source
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
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Article for paraboloid

an open surface generated by rotating a parabola (q.v.) about its axis. If the axis of the surface is the z axis and the vertex is at the origin, the intersections of the surface with planes parallel to the xz and yz planes are parabolas (see , top). The intersections of the surface with planes parallel to and above the xy plane are circles. The general equation for this type of paraboloid is x2/a2 + y2/b2 = z

Learn more about paraboloid with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of The Day

Difficulty index for paraboloid

Some English speakers likely know this word

Word Value for paraboloid

15
0
Scrabble Words With Friends