Knob

(n.) A hard protuberance; a hard swelling or rising; a bunch; a lump; as, a knob in the flesh, or on a bone.

Knob - Other Definitions

(n.) A hard protuberance; a hard swelling or rising; a bunch; a lump; as, a knob in the flesh, or on a bone.
(n.) A knoblike ornament or handle; as, the knob of a lock, door, or drawer.
(n.) A rounded hill or mountain; as, the Pilot Knob.
(n.) See Knop.
(v. i.) To grow into knobs or bunches; to become knobbed.