Catoptrical is a term that refers to optical devices or phenomena involving reflection. Synonyms for catoptrical include reflective, mirrored, specular, shining, bright, and gleaming. These words are often used to describe surfaces that reflect light, such as a polished metal or glass. Other related terms include reflective optics, mirror optics, and reflectometry. The concept of catoptrics has been studied for centuries, with ancient Greeks and Romans using mirrors to focus the sun's rays and to start fires. Today, catoptrics remains an important area of study in fields such as optics, astronomy, and physics.