1 文書を見つけるための辞書。

• oval, ellipse
• 卵型, 楕円, 長円
• 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"
• 円錐と、円錐を完全に横断する平面との交差によってできる平面の閉曲線