The depressor supercilii is a small facial muscle that assists in lowering the eyebrows and creating an expression of sadness or concern. There are numerous synonyms for this muscle, including the brow depressor, brow sulker, eyebrow lowerer, and frown muscle. Other less common synonyms include the orbicularis depressor, corrugator, and procerus muscle. The depressor supercilii is a vital component of facial expressions and can be targeted in facial rejuvenation procedures to help lift sagging eyebrows and reverse signs of aging. Understanding the various synonyms for this muscle can be helpful for medical professionals and individuals interested in learning more about facial anatomy.