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Definitions for Ellipse

[1] a plane curve such that the sums of the distances of each point in its periphery from two fixed points, the foci, are equal. It is a conic section formed by the intersection of a right circular cone by a plane that cuts the axis and the surface of the cone. Typical equation: (x 2 /a 2 ) + (y 2 /b 2 ) = 1. If a = b the ellipse is a circle.
[2] a closed conic section shaped like a flattened circle and formed by an inclined plane that does not cut the base of the cone. Standard equation x ²/ a ² + y ²/ b ² = 1, where 2 a and 2 b are the lengths of the major and minor axes. Area: π ab

Words related to Ellipse

trajectory, rotation, pattern, path, arc, arch, contour, loop, apogee, track, curve, course, circle, locus, lap, round, cycle, perigee, swerve, sweep

Words nearby Ellipse

ellicott city, ellington, ellington, duke, elliot's operation, elliott, ellipse, ellipsis, ellipsograph, ellipsoid, ellipsoid of revolution, ellipsoidal

Origin of Ellipse

1745–55; < French < Latin ellīpsis ellipsis; or by back formation from the plural ellipses

Word origin for Ellipse

C18: back formation from ellipsis

Synonyms for Ellipse

path, pattern, rotation, trajectory, apogee, circle, course, curve, cycle, lap, locus, perigee, round, track, circumgyration