Small element that articulates with the prepollex, metacarpal II(I) and metacarpal III(II). It may be fused to element Y or carpal 3(2).[AAO], The trapezoid bone (lesser multangular bone) is a carpal bone in tetrapods, including humans. It is the smallest bone in the distal row. It may be known by its wedge-shaped form, the broad end of the wedge constituting the dorsal, the narrow end the palmar surface; and by its having four articular facets touching each other, and separated by sharp edges. It is homologous with the 'second distal carpal' of reptiles and amphibians. The etymology derives from the Greek trapezion which means 'irregular quadrilateral,' from tra- 'four' and peza 'foot' or 'edge. ' Literally, 'a little table' from trapeza meaning 'table' and -oeides 'shaped.[Wikipedia:Trapezoid_bone]

uberon

manus distal carpal bone 2, lesser multiangular, carpal 2, lesser multangular, hand distal carpal bone 2

UBERON:0001431

located in the distal part of the carpus and articulating with the second metacarpal, the distal carpals 1 and 2 and the radiale.[VSAO] in humans - The capitate articulates with 2nd metacarpal distally, scaphoid proximally, trapezium medially, capitate medially[WP] Amphibians: Small element that articulates with the prepollex, metacarpal II(I) and metacarpal III(II). It may be fused to element Y or carpal 3(2)

• fused carpal bones 2 and 3