Ligament of the wrist
The palmar radioulnar ligament (volar radioulnar ligament, anterior radioulnar ligament) is a narrow band of fibers extending from the anterior margin of the ulnar notch of the radius to the front of the head of the ulna.
It is sometimes abbreviated PRUL.[1]
References
This article incorporates text in the public domain from page 325 of the 20th edition of Gray's Anatomy (1918)