ellipsoid

[ ih-lip-soid ]
/ ɪˈlɪp sɔɪd /

noun

Geometry. a solid figure all plane sections of which are ellipses or circles. Typical equation: (x2/a2) + (y2/b2) + (z2/c2) = 1.

adjective

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Origin of ellipsoid

From the French word ellipsoïde, dating back to 1715–25. See ellipse, -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for ellipsoid

British Dictionary definitions for ellipsoid

ellipsoid
/ (ɪˈlɪpsɔɪd) /

noun

  1. a geometric surface, symmetrical about the three coordinate axes, whose plane sections are ellipses or circles. Standard equation: x ²/ a ² + y ²/ b ² + z ²/ c ² = 1, where ± a, ± b, ± c are the intercepts on the x-, y-, and z- axes
  2. a solid having this shapethe earth is an ellipsoid

Derived forms of ellipsoid

ellipsoidal (ɪlɪpˈsɔɪdəl, ˌɛl-), 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

Scientific definitions for ellipsoid

ellipsoid
[ ĭ-lĭpsoid′ ]

A three-dimensional geometric figure resembling a flattened sphere. Any cross section of an ellipsoid is an ellipse or circle. An ellipsoid is generated by rotating an ellipse around one of its axes.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.