Definitions for "Ellipsoid"
a three-dimensional ellipse; narrow or narrowly rounded at ends and widest in the middle.
A mathematical formulation of the shape of the Earth which is defined by a semimajor axis and its eccentricity. There are 11 official ellipsoids in use throughout the world. The Clark Ellipsoid of 1866 is used in North America.
a closed surface, with three axes
Keywords:  elliptic, plane, circle, solid, tapers
A solid, all plane sections of which are ellipses or circles. See Conoid, n., 2 (a).
an elliptic solid
Tapers equally at both ends; more than twice as long as broad.
Keywords:  cystidia, spores
(spores) l/w = l/b = 1.3-1.6; (cystidia) Q = 1.3-1.6.
Pertaining to, or shaped like, an ellipsoid; as, ellipsoid or ellipsoidal form.
rugby football shaped
Centered at c, this is the set E(c,Q)={x: (x-c)'[Q^-1](x-c) = 1}, where Q is a symmetric, positive definite matrix.
Keywords:  form
in the form of an ellipse