This article deals primarily with spherical and ellipsoidal models of the Earth.
From the en.wikipedia.org
The earth does not have a perfect ellipsoidal shape, but is described as a geoid.
From the en.wikipedia.org
The new model is ellipsoidal, so it's easier to tell which way it's pointing.
From the time.com
Commonly an ellipsoidal model is part of a more encompassing geodetic datum.
From the en.wikipedia.org
The relation of Cartesian and ellipsoidal coordinates is discussed in Torge.
From the en.wikipedia.org
Certain openings were ellipsoidal in form, one or several pieces were oval or circular.
From the en.wikipedia.org
The former shares the hooked hymenial setae and ellipsoidal to broadly ellipsoidal spores.
From the en.wikipedia.org
The fruit is ellipsoidal, 20-30 mm long, with seeds about 4 mm long.
From the en.wikipedia.org
An ellipsoidal approximation for the surface of the earth may be useful over great distances.
From the en.wikipedia.org
More examples
Ellipsoid: having the nature or shape of an ellipsoid
(ellipsoid) a surface whose plane sections are all ellipses or circles; "the Earth is an ellipsoid"
(Ellipsoid) three dimensionally elliptic.
(Ellipsoid) shaped like a narrow oval in longitudinal section and a circle in cross-section
(Ellipsoid) A mathematical figure generated by the revolution of an ellipse about one of its axes. The ellipsoid that approximates the geoid is an an ellipse rotated about its minor axis. An ellipsoid serves as the mathematical model from which maps and charts are produced. ...
(ellipsoid) in geometric terms, a closed surface of which all planar sections are ellipses. In general framework, GIS, and mapping practices, an ellipsoid is a specific mathematical representation of the earth that more closely approximates the shape of the surface than a sphere does.
(Ellipsoid) A three-dimensional mathematical model which approximates the shape of the geoid. Many different ellipsoids have been developed for continents or individual countries to minimize local deviations from the geoid. ...
(Ellipsoid) The type of reflector used in many profile spots. Often used in America now to refer to all profile spotlights. The reflector is formed in a regular oval shape.
(Ellipsoid) When used to represent the Earth, a solid geometric figure formed by rotating an ellipse about its minor (shorter) axis. Also called spheroid.