Definitions for "Spheroid"
A body or figure approaching to a sphere, but not perfectly spherical; esp., a solid generated by the revolution of an ellipse about one of its axes.
A body that is shaped like a sphere but is not perfectly round.
A detailed mathematical calculation of the shape of the earth. A spheroid takes into account the non-spherical shape of Earth, and offers a model that increases the accuracy of measurements on its irregular surface.
Keywords:  clarke, inherent, info, arc, default
spheroid upon which the projection will be based. The ARC/INFO default is Clarke 1866 if no other spheroid is specified or if it is not inherent to the projection.