oval

noun

a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
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
- the sums of the distances from the foci to any point on an ellipse is constant
  焦点から長円上のあらゆる点への距離の和は一定である

adjective

rounded like an egg
卵のように円形にされる

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