: the surface generated by the rotation of a parabola about its axis
it is a property of a paraboloid of revolution … that rays from an object at infinity are all imaged at the same point on the axis — F.W.Sears
: the surface generated by the rotation of a parabola about its axis
it is a property of a paraboloid of revolution … that rays from an object at infinity are all imaged at the same point on the axis — F.W.Sears
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012