ellipse

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noun el·lipse \i-ˈlips, e-\

Definition of ellipse

  1. 1 a :  oval b :  a closed plane curve generated by a point moving in such a way that the sums of its distances from two fixed points is a constant :  a plane section of a right circular cone that is a closed curve

  2. 2 :  ellipsis

Did You Know?

A closed curve consisting of points whose distances from each of two fixed points (foci) all add up to the same value is an ellipse. The midpoint between the foci is the center. One property of an ellipse is that the reflection off its boundary of a line from one focus will pass through the other. As a result, in an elliptical room, a person whispering at one focus is easily heard by someone at the other. An oval may or may not fit the definition of an ellipse.

Illustration of ellipse

Origin and Etymology of ellipse

Greek elleipsis


First Known Use: circa 1753

Other Mathematics and Statistics Terms


ELLIPSE Defined for English Language Learners

ellipse

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noun el·lipse \i-ˈlips, e-\

Definition of ellipse for English Language Learners

  • : a shape that resembles a flattened circle


ELLIPSE Defined for Kids

ellipse

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noun el·lipse \i-ˈlips\

Definition of ellipse for Students

  1. :  a shape that looks like a flattened circle


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