Definition of "left-handedness" [left•-hand•ed•ness]

• The state of being left-handed. (noun)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "Almost double the incidence of left-handedness in the general population."
• "Some of the oldest evidence of left-handedness comes from Kenya, where of a 500,000 year-old cache of 54 stone tools made by one of our pre-human ancestors, six (or about 11 percent) were chipped using the left hand."
• "The incidence of left-handedness seems to be constant throughout history."