The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
| n. 1.  a.  A spiral. b.  A single turn of a spiral; a whorl. 2.  The area farthest from the aperture and nearest the apex on a coiled gastropod shell. [Latin spīra, coil, from Greek speira.] | 
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.












