bow hand

from The Century Dictionary.

• noun In archery, the hand that holds the bow, commonly the left hand.
• noun In music, the hand that draws the bow; a violinist's right hand.
• noun Wrong in one's calculations.

from the GNU version of the Collaborative International Dictionary of English.

• (Archery) The hand that holds the bow, i. e., the left hand.
• (Mus.) The hand that draws the bow, i. e., the right hand.