Source : WordNet®

left-hander
     n 1: a baseball pitcher who throws the ball with the left hand
          [syn: {left-handed pitcher}, {left hander}, {lefthander},
           {lefty}, {southpaw}]
     2: a person who uses the left hand with greater skill than the
        right; "their pitcher was a southpaw" [syn: {lefty}, {southpaw}]