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ELLIPSOID

 - 3 dictionary results

el⋅lip⋅soid

  [i-lip-soid]
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–noun
1. Geometry. a solid figure all plane sections of which are ellipses or circles. Typical equation: (x2/a2) + (y2/b2) + (z2/c2) = 1.
–adjective
2. ellipsoidal.
Origin:
1715–25; < F ellipsoïde. See ellipse, -oid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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el·lip·soid   (ĭ-lĭp'soid')   


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n.  A geometric surface, all of whose plane sections are either ellipses or circles.
el·lip'soid', el·lip'soi'dal (ĭ-lĭp'soid'l, ěl'ĭp-, ē'lĭp-) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia

ellipsoid

closed surface of which all plane cross sections are either ellipses or circles. An ellipsoid is symmetrical about three mutually perpendicular axes that intersect at the centre

Learn more about ellipsoid with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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