A spheroidMathworldPlanetmathPlanetmath or ellipsoid of revolution is an ellipsoidMathworldPlanetmathPlanetmath such that two of the axes are equal in length. The name ellipsoid of revolution refers to the fact that such a shape is rotationally symmetric about the third axis. By way of contrast, the term triaxial ellipsoid is used to specify that the three axes are of different lengths. Also, the term oblate is used to describe spheriods in which the two axes of equal length are longer than the third (think of a doorknob) whilst the term prolate is used to describe spheriods for which the two equally long axes are shorter than the third axis (think of a cigar).

Title spheroid
Canonical name Spheroid
Date of creation 2013-03-22 14:56:48
Last modified on 2013-03-22 14:56:48
Owner rspuzio (6075)
Last modified by rspuzio (6075)
Numerical id 5
Author rspuzio (6075)
Entry type Definition
Classification msc 51M05
Synonym ellipsoid of revolution
Defines triaxial
Defines oblate
Defines prolate