Turbinated

1. a. Spiral with the whorls decreasing rapidly from a large base to a pointed apex; — said of certain shells.
2. a. Whirling in the manner of a top.
3. a. Shaped like a top, or inverted cone; narrow at the base, and broad at the apex; as, a turbinated ovary, pericarp, or root.
4. a. Turbinal.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.