adjective
Definition: Relating to small bones that form in tendons or joint capsules, often helping to reduce friction and improve movement.
Example: The doctor explained that the sesamoid bones in the foot help with walking and running.
noun
Definition: A small, rounded bone or cartilage found in a tendon, usually near a joint, that helps to reduce friction and improve the leverage of muscles.
Example: The patella is the largest sesamoid bone in the human body, located in the knee.