ulnar collateral ligament
noun
plural ulnar collateral ligaments
1
: a triangular ligament of the inner side of the elbow that connects the medial parts of the humerus with the ulna, helps to stabilize the elbow joint, and is often injured in sports (such as baseball) which involve repeated overhand throwing
… the preseason Atlantic Sun pitcher of the year, will miss the rest of the season after suffering ulnar collateral ligament damage on the inside of his throwing elbow.—Dana Caldwell
called also UCL
2
: a ligament of the wrist on the little finger side that connects the distal end of the ulna with bones in the wrist and helps to stabilize the wrist joint
Palpate to the end of the ulnar styloid, and notice the gap between it and the carpals. … With the wrist in radial deviation, the ulnar collateral ligament can be felt bridging this gap.—Management of Common Musculoskeletal Disorders
called also UCL
3
: a ligament of the inner thumb that connects the two bones at the base of the thumb and helps to stabilize the thumb
… skier's thumb, an ulnar collateral ligament sprain or injury to the thumb usually resulting from a fall.—Heidi Splete
called also UCL
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Merriam-Webster unabridged
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