knuckle joint

English Thesaurus

1. a joint allowing movement in one plane only (noun.artifact)

hypernym	:	joint,
definition	:	junction by which parts or objects are joined together (noun.artifact)

2. a joint of a finger when the fist is closed (noun.body)

hypernym	:	articulatio synovialis, diarthrosis, synovial joint,
definition	:	a joint so articulated as to move freely (noun.body)

part meronym	:	finger,
definition	:	any of the terminal members of the hand (sometimes excepting the thumb) (noun.body)

derivation	:	knuckle,
definition	:	press or rub with the knuckles (verb.contact)

derivation	:	knuckle,
definition	:	press or rub with the knuckles (verb.contact)