|- style="text-align: center; line-height: 1;" class="hiddenStructure"
| colspan="2" |The left lesser multangular bone.
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|Latin
|colspan="2"|os trapezoideum, os multangulum minus
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|[[List of subjects in Gray's Anatomy:54#Gray.27s_page_.23|Gray's]]
|colspan="2"|[subject #54 ]
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|Origins
|colspan="2"|
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|Insertions
|colspan="2"|
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|Articulations
|colspan="2"|articulates with four bones: scaphoid proximally second metacarpal distally trapezium bone laterally capitate medially
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|MeSH
|colspan="2"|[A02.835.232.087.319.150.805]
|- class="hiddenStructure"
|Dorlands/Elsevier
|colspan="2"|[o_07/12598807]
|}
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.
Surfaces
The superior surface, quadrilateral, smooth, and slightly concave, articulates with the scaphoid.
The inferior surface articulates with the proximal end of the second metacarpal bone; it is convex from side to side, concave from before backward and subdivided by an elevated ridge into two unequal facets.
The dorsal and palmar surfaces are rough for the attachment of ligaments, the former being the larger of the two.
Trapezoid distinguishing meanings of trapezoid and trapezium in American English and British English
This article is based on an entry from the 1918 edition of Gray's Anatomy, which is in the public domain. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
