Sesamoid is a term used to describe small bones that are embedded in the tendons or muscles, providing additional support and protection. There are several synonyms for the word, including ossicle, which refers to small bone structures, and pisiform, which is a small wrist bone around the size of a pea. Another synonym is patella, which is a flat triangular bone located in the knee joint. Other synonyms include fabella, a sesamoid bone found in the muscles behind the knee, as well as navicular, which is a small bone found in the foot. These synonyms are used in various medical contexts to describe minor bone structures that are crucial to the proper functioning of the body.