The abductor pollicis longus is a muscle located in the forearm that aids in the abduction and extension of the thumb. Although commonly referred to by its scientific name, there are various synonyms for this muscle that exist. Some common synonyms include the long abductor muscle of the thumb, pollical abductor muscle, or simply the abductor muscle. In more technical language, individuals may refer to it as extensor primi internodii pollicis or the first internodal extensor muscle of the thumb. These synonyms are frequently used in medical terminology and are essential for individuals in the healthcare field to understand when discussing anatomical structures and movements.