styloid process of ulna

n.
  1. A cylindrical, pointed projection from the medial and posterior aspect of the head of the ulna, to the tip of which is attached the ulnar collateral ligament of the wrist.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.