parabola
/pəˈræbələ/noun
(pl. parabolas 或parabolae /-liː/ )
- a symmetrical open plane curve formed by the intersection of a cone with a plane parallel to its side. The path of a projectile under the influence of gravity follows a curve of this shape.抛物面; 抛物线。
词源
late 16th cent.: modern Latin, from Greek parabolē 'placing side by side, application', from para- 'beside' + bolē 'a throw' （from the verb ballein）.