Turbinate

a.
  1. Whirling in the manner of a top.
  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.
  3. (Anat.) Turbinal.
  4. (Zoöl.) Spiral with the whorls decreasing rapidly from a large base to a pointed apex; -- said of certain shells.