This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Of or designating any of certain small modular bones or cartilages that develop in a tendon or in the capsule of a joint.

n. A sesamoid bone or cartilage.

adj. Resembling a sesame seed in size or shape.

adj. Of or relating to a sesamoid bone.

n. A sesamoid bone or sesamoid cartilage.

adj. Resembling in shape the seeds of sesame.

adj. Of or pertaining to the sesamoid bones or cartilages; sesamoidal.

n. A sesamoid bone or cartilage.

Having the shape of a grain of sesame: especially applied in anatomy to small independent osseous or cartilaginous bodies occurring in tendinous structures.

n. In anatomy, a bone developed in the tendon of a muscle at or near a joint; a scleroskel-etal ossification, usually of a nodular shape.

n. any of several small round bones formed in a tendon where it passes over a joint

"Open Cup semifinal Wednesday, and at some point, apparently fractured the sesamoid bone in his right foot -- the same ailment that required surgery in preseason and prevented him from playing in a league match until July 31."

sesamoid cartilages   

os    bone   

sesamoid bones    sesamoid fibrocartilages    sesamoid cartilage of the larynx    sesamoid cartilages    sesamoid nasal cartilages   

kneepan    patella    kneecap   

sesamoidal    sesamoiditis   

sesamoidal   

interphalangeal    neurovascular    mesial    well-gnawed    olecranon    5mb    aitch    innominate    trembly    sphenoid