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conicoid

American  
[kon-i-koid, koh-ni-] / ˈkɒn ɪˌkɔɪd, ˈkoʊ nɪ- /

noun

Geometry.
  1. a quadric, especially a hyperboloid, paraboloid, or ellipsoid.


Etymology

Origin of conicoid

First recorded in 1860–65; conic + -oid

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