sesamoid bone
(redirected from os sesamoideum)Also found in: Dictionary, Thesaurus, Medical.
sesamoid bone
[′ses·ə‚mȯid ‚bōn] (medicine)
A small bone developed in a tendon subjected to much pressure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.