parabola: a plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
scorpion fly: any of various mecopterous insects of the family Panorpidae of the northern hemisphere having a long beak and long antennae; males have a tail like that of a scorpion except it is not venomous