Musculus Triceps Brachii, commonly known as the triceps, is a muscle located at the back of the upper arm. It is responsible for extending the forearm and straightening the arm. There are several synonyms for the term "Musculus Triceps Brachii". Some of the synonyms include triceps muscle, three-headed arm muscle, extensor muscle, posterior upper arm muscle, and tripartite muscle. These terms are commonly used to describe the same muscle, and they all refer to the same functions and anatomy of the Musculus Triceps Brachii. Learning the synonyms for the triceps muscle can help individuals with their anatomy studies and understanding of the upper arm muscles.