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paraboloid

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paraboloid

Main Entry:: pa·rab·o·loid
Pronunciation:: \pə-ˈra-bə-ˌlȯid\
Function:: noun
Date:: circa 1702

: a surface all of whose intersections by planes are either parabolas and ellipses or parabolas and hyperbolas

— pa·rab·o·loi·dal

\-ˌra-bə-ˈlȯi-d^əl\ adjective

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