trapezoid bone
Definition
Noun: 1. A small bone in the wrist: The trapezoid bone is one of the eight small carpal bones that make up the wrist (carpus). It is situated in the distal row of carpal bones, between the trapezium bone and the capitate bone.
Examples of Usage
- Noun:
- An X-ray revealed a fracture in his trapezoid bone.
- The trapezoid bone articulates with four bones: the trapezium, capitate, and the second and third metacarpals.
- Ligament injuries can affect the stability of the trapezoid bone.
Advanced Usage
- Anatomical Context: The term is almost exclusively used in medical, anatomical, or biomechanical contexts. It is rarely used in everyday conversation.
- The surgeon carefully realigned the dislocated trapezoid bone.
Variants and Related Words
- Trapezoid (noun/adjective): In geometry, a quadrilateral with at least one pair of parallel sides. The bone is named for its approximate geometric shape.
- Carpal bones (noun): The collective term for the eight bones of the wrist, which include the trapezoid.
- Lesser multangular bone (noun): An older, synonymous term for the trapezoid bone, though "trapezoid" is now standard.
Synonyms
- Lesser multangular bone (anatomical synonym)
- Os trapezoideum (Latin anatomical term)
Related Phrases
- Carpal tunnel: The passageway in the wrist formed by the carpal bones, including the trapezoid, and a ligament. The trapezoid bone forms part of the radial (thumb-side) wall of the carpal tunnel.
- Distal carpal row: The row of four carpal bones (trapezium, trapezoid, capitate, hamate) closest to the hand. The trapezoid is a member of this row.
Noun
-
the wrist bone between the trapezium and the capitate bones
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