K n.
(K is from the Latin, which used the letter but little except in the early period of the language. It came into the Latin from the Greek, which received it from a Phoenician source, the ultimate origin probably being Egyptian,. Etymologically K is most nearly related to c, g, h (which see).
KNUCKLE n.
and to disfigure the person struck; as, brass knuckles; -- called also knuckle duster. [Slang.] Knuckle joint (Mach.), a hinge joint, in which a projection with an eye, on one piece, enters a jaw between two corresponding projections with eyes, on another piece, and is retained by a pin which passes through the eyes a…