Main Entry: el·lipse

Pronunciation: \i-ˈlips, e-\

Function: noun

Etymology: Greek elleipsis

Date: circa 1753

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 : ellipsis

[ellipse illustration]