放ほう物ぶつ線せん

noun

parabola

Mathematical term for the curve formed by the intersection of a cone with a plane parallel to its side.

• 放ほう物ぶつ線せんは二に次じ関かん数すうのグラフとしてよく現あらわれる。

  A parabola often appears as the graph of a quadratic function.

• ボールを投なげたときの軌き道どうは放ほう物ぶつ線せんを描えがく。

  The trajectory of a thrown ball draws a parabola.