[TA] the synovial joints between the carpal and metacarpal bones; these are all plane joints except that of the thumb, which is saddle shaped. Synonym(s): articulationes carpometacarpales [TA]
car·po·met·a·car·pal joints
(kahr'pō-met'ă-kahr'păl joynts) [TA] The synovial joints between the carpal and metacarpal bones; these are all plane joints except that of the thumb, which is saddle-shaped.