Difference between Ellipsoid and Ellipse

What is the difference between Ellipsoid and Ellipse?

Ellipsoid as a noun is a surface, all of whose cross sections are elliptic or circular (includes the sphere) while Ellipse as a noun is a closed curve, the locus of a point such that the sum of the distances from that point to two other fixed points (called the foci of the ellipse) is constant; equivalently, the conic section that is the intersection of a cone with a plane that does not intersect the base of the cone.

Ellipsoid

Part of speech: noun

Definition: a surface, all of whose cross sections are elliptic or circular (includes the sphere) Such a surface used as a model of the shape of the earth.

Part of speech: adjective

Definition: of or pertaining to an ellipse; ellipsoidal Shaped like an ellipse; elliptical. Shaped like a symmetrical oval that is evenly tapered on both ends.

Ellipse

Part of speech: noun

Definition: A closed curve, the locus of a point such that the sum of the distances from that point to two other fixed points (called the foci of the ellipse) is constant; equivalently, the conic section that is the intersection of a cone with a plane that does not intersect the base of the cone.

Part of speech: verb

Definition: To remove from a phrase a word which is grammatically needed, but which is clearly understood without having to be stated.

We hope you now know whether to use Ellipsoid or Ellipse in your sentence.

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