Photoreversal is a term that refers to the reversal of a photochemical reaction caused by light. There are several synonyms for this term, including photoreversion, photo-induced reversal, and light-induced reversal. While these terms may differ slightly in their connotations, they all refer to the same basic process of a chemical reaction being reversed by light. Photoreversal is an important concept in a variety of fields, from photochemistry to materials science to photobiology. Understanding the mechanisms and properties of photoreversal can help scientists develop new materials and technologies that are responsive to light.