1. (used in the plural) a small metal weapon; worn over the knuckles on the back of the hand
   "The police confiscated the brass knuckles during the arrest";
   - brass knucks, knucks, brass knuckles, knuckle duster

1. A joint of a finger; any of the joints connecting the metacarpal bones to the proximal phalanges of the fingers
   "Cracking your knuckles is a common habit for some people";
   - knuckle joint, metacarpophalangeal joint

1. Press or rub with the knuckles
   "He knuckled his eyes sleepily"
    
2. Shoot a marble while keeping one's knuckles on the ground
   "The boy knuckled his shooter marble with precision"

Derived forms: knuckleses

Type of: arm, articulatio synovialis, diarthrosis, press, shoot, synovial joint, weapon, weapon system

Part of: finger

Encyclopedia: Knuckles, William