# spheroid

A *spheroid ^{}* or

*ellipsoid of revolution*is an ellipsoid

^{}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 |