Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of paraboloidal is as below...

Paraboloidal :: Paraboloidal (a.) Of, pertaining to, or resembling, a paraboloid..

Phonautograph :: Phonautograph (n.) An instrument by means of which a sound can be made to produce a visible trace or record of itself. It consists essentially of a resonant vessel, usually of paraboloidal form, closed at one end by a flexible membrane. A stylus attached to some point of the membrane records the movements of the latter, as it vibrates, upon a moving cylinder or plate..

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