paraboloid noun & adjective. [pǝ'rab(ǝ)lɔɪd] M17.
[from PARABOLA + -OID.]
Geometry.
A. noun.
1. = PARABOLA 2. M17-E18.

2. A solid or surface of which the cross-sections in two mutually perpendicular directions are parabolas and those in the third are ellipses or hyperbolas; spec. one with circular cross-sections, generated by the rotation of a parabola about its axis of symmetry (also more fully paraboloid of revolution). E18.
b. adjective. Paraboloidal. rare. M19.

■ parabo'loidal adjective of the form of a paraboloid E19.

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