ellipse
1. [ noun ] (mathematics,geometry) a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
Synonyms: oval
Examples:

"the sums of the distances from the foci to any point on an ellipse is constant"

Related terms: conic_section circle
Similar spelling:   ellipsis
  elapse
  elapsed
  elvis
  Elops
  ellipsoid
  elvish
  elfish