turbination

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A turbinate formation.

Century Dictionary and Cyclopedia

1. n. The act of turbinating, or the state of being turbinate.
2. n. That which is turbinated; a whorled or scroll-like formation, as a shell.

Wiktionary

1. n. The act of spinning or whirling.

GNU Webster's 1913

1. n. The act of spinning or whirling, as a top.