Definition

1. Noun:
   • A small pyramidal carpal bone in the proximal row of the wrist: The triquetral bone is one of the eight small bones (carpals) that make up the wrist. It is located on the medial side (the side of the little finger) of the wrist, in the proximal row. Its name derives from its roughly three-sided, pyramidal shape.

Usage Examples

• Noun:
  • A fracture of the triquetral bone is a common wrist injury from a fall.
  • The triquetral bone articulates with the pisiform, hamate, and lunate bones.

Advanced Usage

• Anatomical Context: The term is primarily used in medical, anatomical, and biomechanical contexts. It is often discussed in relation to wrist stability, motion, and injury.
  • The ligament connecting the lunate and triquetral bones is crucial for carpal stability.

Variants and Related Words

• Triquetrum: This is the Latin-derived synonym for the triquetral bone and is commonly used in anatomical terminology.
  • The triquetrum forms part of the ulnar side of the carpal tunnel.
• Cuneiform bone: This is an older, now less common term for the same bone.
• Os triquetrum: The full Latin term.

Synonyms

• Triquetrum
• Os triquetrum
• Cuneiform bone (historical/less precise)

Related Terms (Not Synonyms)

• Carpal bones: The general category of wrist bones to which the triquetral belongs.
• Pisiform: The small carpal bone that articulates with the anterior surface of the triquetral.
• Hamate: The carpal bone in the distal row that articulates with the triquetral.
• Lunate: The carpal bone in the proximal row that articulates with the triquetral.

Noun

1. a wrist bone that articulates with the pisiform and hamate and lunate bones