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a bone formed after birth in a tendon where it passes over a joint, for example, the patella.
Synonym(s): os sesamoideum [TA]
Farlex Partner Medical Dictionary © Farlex 2012
sesamoid bone(1) A bone located in the tendons of the flexor hallucis brevis on the plantar aspect of the foot, which help redistribute and attenuate force over the first metatarsal head during the toe-off portion of gait or propulsion.
(2) A membranous bone formed in a tendon in response to joint stress (e.g., patella).
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
ses·a·moid bone(ses'ă-moyd bōn) [TA]
A bone formed after birth in a tendon where it passes over a joint (e.g., the patella).
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
sesamoid boneA bone lying within a tendon to assist in its mechanical action and to bear pressure. The most conspicuous sesamoid bone is the knee cap (patella).
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005