Knob

nob, n. a hard protuberance: a hard swelling: a round ball.— adj. Knobbed , containing or set with knobs.— n. Knob′bine .— adj. Knob′by , full of knobs: knotty.— n. Knob′stick ( slang ), a synonym for a blackleg or scab in trades-union slang. [ Knop .]