oval

Adjective

• rounded like an egg

Noun

• a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
  • the sums of the distances from the foci to any point on an ellipse is constant
    

Related words

• Synonyms: 
  egg-shaped , elliptic , elliptical , oval-shaped , ovate , oviform , ovoid , prolate , ellipse