GC: n

S: file:///Users/Fer/Downloads/Triquetrum%20Fracture.pdf (last access: 5 June 2016); http://www.ncbi.nlm.nih.gov/pubmedhealth/PMHT0023134/ (last access: 5 June 2016); http://www.healthline.com/human-body-maps/triquetrum-bone (last access: 5 June 2016).

N: 1. triquetrum (adj): From the Latin triquetrus which means three-cornered.
bone (n): Old English ban “bone, tusk,” from Proto-Germanic *bainam (source also of Old Frisian ben, Old Norse bein, Danish ben, German Bein). No cognates outside Germanic (the common PIE root is *os-; see osseous); the Norse, Dutch, and German cognates also mean “shank of the leg,” and this is the main meaning in Modern German, but English never seems to have had this sense.
2. The triquetrum bone is one of the small bones that make up the carpus. It is also known as the triquetral bone, (and in the past the pyramidal or triangular bone).
3. triquetral bone: the bone in the proximal row of the carpus that is third counting from the thumb side of the wrist, has a pyramidal shape, and is situated between the lunate and pisiform bones—called also triangular, triangular bone, triangularis, triquetral, triquetrum.
4. The triquetral bone (also called triquetrum bone, pyramidal bone, three-cornered bone, and triangular bone) is located in the wrist on the medial side of the proximal row of the carpus, between the lunate and pisiform bones. It is on the ulnar side of the hand, but does not articulate with the ulna. It connects with the pisiform, hamate, and lunate bones. It is the third most commonly fractured carpal bone.
The triangular bone may be distinguished by its pyramidal shape, and by an oval isolated facet for articulation with the pisiform bone. It is situated at the upper and ulnar side of the carpus. To facilitate its palpation in an exam, the hand must be radially deviated so that the triquetrium moves out from under the ulnar styloid process. The triquetrum may be difficult to find, since it also lies under the pisiform.

S: 1. http://www.orthopaedicsone.com/display/Main/Triquetrum (last access: 5 June 2016); OED – http://www.etymonline.com/index.php?term=bone (last access: 5 June 2016). 2. file:///Users/Fer/Downloads/Triquetrum%20Fracture.pdf (last access: 5 June 2016). 3. MW – http://www.merriam-webster.com/medical/triquetral%20bone (last access: 5 June 2016). 4. http://www.orthopaedicsone.com/display/Main/Triquetrum (last access: 5 June 2016).

SYN: triquetral bone

S: http://www.healthline.com/human-body-maps/triquetrum-bone (last access: 5 June 2016); MW – http://www.merriam-webster.com/medical/triquetral%20bone (last access: 5 June 2016).

CR: pyramidalis