Parabolas

thumb|right|upright=1.36|Part of a parabola (blue), with various features (other colours). The complete parabola has no endpoints. In this orientation, it extends infinitely to the left, right, and upward. thumb|The parabola is a member of the family of conic sections.

thumb|right|Paraboloid of revolution In geometry, a paraboloid is a quadric surface that has exactly one axis of symmetry and no center of symmetry. The term "paraboloid" is derived from parabola, which refers to a conic section that has a similar property of symmetry.

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function defined by a polynomial of degree two

reflector / collector that has the shape of a paraboloid

parabolic arch is an arch shaped like a parabola

the ratio, for any parabola, of the arc length of the parabolic segment formed by the latus rectum to the focal parameter; ln(1+√2)+√2