·noun The joint of a plant.
II. Knuckle ·vt To beat with the knuckles; to Pommel.
III. Knuckle ·noun The joining pars of a hinge through which the pin or rivet passes; a knuckle joint.
IV. Knuckle ·noun The joint of a finger, particularly when made prominent by the closing of the fingers.
V. Knuckle ·vi To Yield; to Submit;
— used with down, to, or under.
VI. Knuckle ·noun The kneejoint, or middle joint, of either leg of a quadruped, especially of a calf;
— formerly used of the kneejoint of a human being.
VII. Knuckle ·noun A convex portion of a vessel's figure where a sudden change of shape occurs, as in a canal boat, where a nearly vertical side joins a nearly flat bottom.
VIII. Knuckle ·noun A contrivance, usually of brass or iron, and furnished with points, worn to protect the hand, to add force to a blow, and to disfigure the person struck; as, brass knuckles;
— called also knuckle duster.