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noun
See knuckle-duster in American Heritage Dictionary 4
(nŭkˈəl-dŭsˌtər)
Browse entries near knuckle-duster
knuckle joint
knuckle pads
knuckle sandwich
knuckle under
knuckle under (idioms)
knucklebone
knucklebone (medical)
knuckled
knucklehead
knuckler