Dictionary

hyperboloid

noun hy·per·bo·loid \-ˌlid\

Definition of HYPERBOLOID

:  a quadric surface whose sections by planes parallel to one coordinate plane are ellipses while those sections by planes parallel to the other two are hyperbolas if proper orientation of the axes is assumed
hy·per·bo·loi·dal \(ˌ)hī-ˌpər-bə-ˈli-dəl\ adjective

First Known Use of HYPERBOLOID

1743

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