knuckle

IPA: nˈʌkʌɫ

Any of the joints between the bones of the fingers.
(by extension) A mechanical joint.
(sports, billiards, snooker, pool) The curved part of the cushion at the entrance to the pockets on a cue sports table.
The kneejoint of a quadruped, especially of a calf; formerly, the kneejoint of a human being.
A cut of meat of various kinds.
(obsolete) The joint of a plant.
(shipbuilding) 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.
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; a knuckle duster.
(skiing, snowboarding) The rounded point where a flat changes to a slope on a piste.

(transitive) To apply pressure, or rub or massage with one's knuckles (sense 1).
(transitive, slang) To strike or punch.
(intransitive) To bend the fingers.
(intransitive) To touch one's forehead as a mark of respect.
(intransitive, figurative) To yield.
(snowboarding, skiing) To land on the knuckle (sense 9) of a curve of a slope, after a jump off a ramp that precedes the slope.

Examples of "knuckle" in Sentences

A knuckle is a joint on the hand.
The Herpetofauna of the Knuckles Range.
The bump occupies the knuckle space beneath the big toe.
None of these features were present in bare knuckle pugilism.
The attached 4 inch blade protruded between the knuckles of the user.
Can we list his style as Bare knuckle boxing or Pugilism or something
Less money came into the sport and bare knuckle pugilism slowly died out.
Each knuckle joint is defined by knuckle members formed on each housing section.
A third knuckle method is to start at the index knuckle and go to July on the little finger knuckle and then start back on the little finger with August.