The term 'hand, palm of' can be broken down into two crossword solutions: 'volar' (5 letters) and 'thenar' (6 letters). The volar surface of the hand is the palm side, which is the area of the hand that faces the ground when the arm is extended. The thenar surface of the hand is the area of the hand that is closest to the thumb and includes the base of the thumb. This area is often used for gripping and manipulating objects.