The latissimus dorsi is a muscle in the back that is commonly referred to as the "lats". However, there are several other synonyms for this muscle that are worth knowing about. One such synonym is the "broadest muscle of the back", which is a descriptive term that accurately captures the large size of the latissimus dorsi. Another synonym is the "teres major", which is a smaller muscle that is located near the latissimus dorsi. Additionally, the "posterior axillary fold" is a term used to describe the fold of skin that forms between the latissimus dorsi and the posterior deltoid muscle. Knowing these synonyms can help medical professionals effectively communicate with one another and with patients.