paraboloid Syllabification: (pa·rab·o·loid)Pronunciation: /pəˈrabəˌloid/Definition of paraboloid noun 1 (also paraboloid of revolution) a solid generated by the rotation of a parabola around its axis of symmetry. 2a solid having two or more nonparallel parabolic cross sections. Derivatives paraboloidalPronunciation: /pəˌrabəˈloidl/ adjective paraboloid in other Oxford dictionaries Definition of paraboloid in the British & World English dictionary