Subclavius is a muscle located in the human body that runs just beneath the collarbone and connects to the first rib. There are a few synonyms that can be used to refer to this muscle. Some alternative names for subclavius include the lesser pectoral muscle, the clavicle muscle, and the infraclavicular muscle. These synonyms can be useful for medical professionals, students, and anyone who is interested in anatomy. By knowing alternate terms for subclavius, individuals can more easily understand the connections, functions, and movements of this crucial muscle.