os sesamoideum

Noun
  1. Any of several small round bones formed in a tendon where it passes over a joint (synset 105288011)
    is a type of: bone, os - rigid connective tissue that makes up the skeleton of vertebrates
    subtypes: kneecap, kneepan, patella - a small flat triangular bone in front of the knee that protects the knee joint
    same as: sesamoid, sesamoid bone

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