Supercilium is a Latin word that refers to the eyebrow region of the human face. Synonyms for the word supercilium include brow, eyebrow, and arch. The brow is an important aesthetic feature of the face that serves to protect the eyes from sweat and other debris. Eyebrow hairs are often groomed and shaped, and many people choose to tint or color their eyebrows to enhance their appearance. The arch of the supercilium can also be adjusted to alter the overall appearance of the face. While supercilium is the formal medical term for the eyebrow region, synonyms such as brow, eyebrow, and arch are more commonly used in everyday language.