Pronunciation: (sin"u-stral'i-tē), [key]
1. the state or quality of having the left side or its parts or members different from and, usually, more efficient than the right side or its parts or members; left-handedness.
2. preference for using the left hand or side.
3. the state of being sinistral. Cf. dextrality.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.