1. Of or facing the left side.
2. Left-handed.
3. Zoology. Relating to or being a gastropod shell that has its aperture to the left when facing the observer with the apex upward.

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.