The human brow is an important facial feature that can convey a wide range of emotions. Some synonyms for eye-brow include the arch, the brow ridge, the forehead peak, and the supraorbital margin. The eyebrow is made up of tiny hairs that give shape and depth to the face. It is often the focus of beauty routines that shape, tint, or pluck to achieve a desired look. Other synonyms for eyebrow include the brow bone, the eye ridge, the tarsal plate, and even the unibrow, which refers to when the eyebrows meet in the middle. Whether thick or thin, symmetrical or asymmetrical, the eyebrow is a fascinating part of human anatomy.