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conicoid

[kon-i-koid, koh-ni-]
noun Geometry.
  1. a quadric, especially a hyperboloid, paraboloid, or ellipsoid.
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Origin of conicoid

First recorded in 1860–65; conic + -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018