shaped like a sesame seed; specif., designating or of any of certain small bones developing in tendons, as at a joint, or any of certain small cartilaginous nodules in the nose
noun
such a bone or cartilage
See sesamoid in American Heritage Dictionary 4
(sĕsˈə-moidˌ)
adjective
Of or designating any of certain small modular bones or cartilages that develop in a tendon or in the capsule of a joint.