- anatomy an enlarged knoblike structure at the end of a bone that forms an articulation with another bone; capitulum
C19: from Latin, diminutive of capitulum
Examples from the Web for capitellum
- The rounded protuberance at the lower end of the humerus that articulates with the radius.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.