"body resembling, but not identical with, a sphere," 1560s, from Latin sphaeroides, from Greek sphairoeides "ball-like, spherical," from sphaira (see sphere) + -oeides "form&q [..]

n. A body having nearly the form of a sphere.

See ellipsoid.

[geodesy] A spheroid is a three-dimensional mathematical model representing the shape of the Earth. It is based on the equation of a sphere.

(n) a shape that is generated by rotating an ellipse around one of its axes

Mathematical figure closely approaching the geoid in form and size and used as a surface of reference for geodetic surveys. A reference spheroid or ellipsoid is a spheroid determined by revolving an e [..]

Sometimes known as ellipsoid; a perfect mathematical figure which very closely approximates the geoid. Used as a surface of reference for geodetic surveys.

A mathematically regular surface resembling a slightly flattened sphere, defined by the length of its axes and used to approximate the geoid in geodetic computations. eg Airy (used in Great Britain, I [..]

Spherical, heterogeneous aggregates of proliferating, quiescent, and necrotic Cells in Culture that retain three-dimensional Architecture and Tissue-specific functions. The ability to form spheroids i [..]

A solid generated by the revolution of an ellipse about either diameter. When revolved about the long diameter, the spheroid is called prolate or the long spheroid ; when about the short diameter, it [..]

Solid figure generated by an ellipse rotating about one of its axes.

Of a shape similar to a squashed sphere.