1. A turn or twist about a center; a spiral.
2. Zoology. One of the whorls of a spiral gastropod shell.

[From Latin volūtus, past participle of volvere, to turn. See volute.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.