(baseball) A baseball pitcher known for throwing knuckleballs.

A form of locomotion of some primates in which they move on all fours with pressure being taken by the knuckles.

plural of knuckleballer

(baseball) A type of pitch with characteristics of both a curveball and a knuckleball.

plural of knuckler

Alternative spelling of white-knuckle

(intransitive, idiomatic) To yield or cooperate when pressured or forced to do so.

A bone that forms a knuckle in the human hand, in an animal's paw or any bone that forms a similar bump. / Such a bone once used in knucklebones and other children's games of chance. / (slang) A die.

Alternative spelling of knuckle dragger

plural of knuckleduster