The Collaborative International Dictionary of English v.0.48:

Turbinate \Tur"bi*nate\, Turbinated \Tur"bi*na`ted\, a. [L.
   turbinatus, fr. turbo, turben, turbinis, a whirl, top.]
   1. Whirling in the manner of a top.
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            A spiral and turbinated motion of the whole.
                                                  --Bentley.
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   2. (Bot.) Shaped like a top, or inverted cone; narrow at the
      base, and broad at the apex; as, a turbinated ovary,
      pericarp, or root.
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   3. (Anat.) Turbinal.
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   4. (Zool.) Spiral with the whorls decreasing rapidly from a
      large base to a pointed apex; -- said of certain shells.
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