The Collaborative International Dictionary
Paraboloidal
Paraboloidal \Par`a*bo*loid"al\, a. Of, pertaining to, or resembling, a paraboloid.
Wiktionary
paraboloidal
a. Having a paraboloid shape.
WordNet
paraboloidal
adj. having the shape of a paraboloid
Usage examples of "paraboloidal".
I'm certain that paraboloidal jib uses the Venturi effect with malice aforethought.