Editing Trapezoid bone (section)

{{Short description|Carpal (wrist) bone}}
{{Infobox bone
| Name          = Trapezoid bone
| Latin         = os trapezoideum, os multangulum minus
| Image         = Trapezoid bone (left hand) 01 palmar view.png
| Caption       = Left hand anterior view (palmar view). Trapezoid bone shown in red.
| Image2        = Gray226.png
| Caption2      = The left trapezoid bone.
| Origins       =
| Insertions    =
| Articulations = Articulates with four bones:<br>[[scaphoid]] proximally<br>[[second metacarpal]] distally<br>[[trapezium bone]] laterally<br>[[capitate]] medially
}}
The '''trapezoid bone''' ('''lesser multangular bone''') is a [[Carpal bones|carpal bone]] in [[tetrapod]]s, including [[humans]]. It is the smallest bone in the distal row of carpal bones that give structure to the palm of the hand. It may be known by its [[wedge (mechanical device)|wedge]]-shaped form, the broad end of the wedge constituting the [[dorsal surface|dorsal]], the narrow end the palmar surface; and by its having four articular facets touching each other, and separated by sharp edges. It is [[homology (biology)|homologous]] with the "second distal carpal" of reptiles and amphibians.