Encyclopedia > Spheroid

  Article Content


A spheroid is a quadric surface in three dimensions obtained by rotating an ellipse about one of its principal axes. If the ellipse is rotated about its major axis, the surface is called a prolate spheroid (similar to the shape of a rugby ball). If the minor axis is chosen, the surface is called an oblate spheroid (similar to the shape of planet Earth).

The sphere is a special case of the spheroid in which the generating ellipse is a circle.

A spheroid is a special case of an ellipsoid where two of the three major axes are equal.

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
Museums in England

... Ryder Foundation Museum[?], Cavendish William Clowes Printing Museum[?], Beccles West Sussex Amberley Working Museum, Arundel Fishbourne Roman ...

This page was created in 58.1 ms