Paraboloid n. : The solid generated by the rotation of a parabola about its axis; any surface of the second order whose sections by planes parallel to a given line are parabolas.

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Taxonomy
hyperbolic paraboloid, paraboloid, elliptic paraboloid, free encyclopedia, paraboloid of revolution, shape, the origin, Curvature, coordinate system, equation, planes, liquid, focal point, parametrized, Multiplication table, Gaussian curvature, mean curvature, search.

Defination from the web:
paraboloid is shaped like an oval cup and can have a maximum or minimum point. ... The hyperbolic paraboloid is a doubly ruled surface, and thus can be used to construct a saddle roof from straight beams. ... The fluid in a spinning cylinder will form a paraboloid. ...