a solid geometrical figure similar in shape to a sphere, as an ellipsoid.


Origin of spheroid

1655–65; < Latin sphaeroīdēs < Greek sphairoeidḗs. See sphere, -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for spheroid

Historical Examples of spheroid

  • Indignantly he had taken his calculations, his blue prints of the spheroid, along with him.

    Slaves of Mercury

    Nat Schachner

  • Its shape is not absolutely spherical, but spheroid—that is, flattened at the poles.

    Astronomy for Amateurs

    Camille Flammarion

  • The spheroid went to the side, sailing low, and out of bounds.

    A Quarter-Back's Pluck

    Lester Chadwick

  • There was a futile attempt to block the kick, but the spheroid sailed over the bar.

    A Quarter-Back's Pluck

    Lester Chadwick

  • The earth is a spheroid, and hence it pulls and is pulled by the moon with a slightly uncentric attraction.

British Dictionary definitions for spheroid



maths another name for ellipsoid of revolution


shaped like but not exactly a sphere
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

Word Origin and History for spheroid

1660s, from Latin sphaeroides, from Greek sphairoeides, from sphaira (see sphere) + -oeides "form" (see -oid).

Online Etymology Dictionary, © 2010 Douglas Harper

spheroid in Medicine


[sfîroid′, sfĕr-]


Having a generally spherical shape.
Related formsspheroid′ n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

spheroid in Science



A three-dimensional geometric surface generated by rotating an ellipse on or about one of its axes.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.