Photoactive is a term that is often used in the context of materials science and chemistry, describing a substance or material that undergoes a chemical change in response to light. Some synonyms for the word photoactive include photosensitive, light-activated, light-sensitive, photoreactive, and phototropic. These terms are often used interchangeably, depending on the context and the specific properties of the material being discussed. Other related terms include photovoltaic, which describes a material's ability to convert light energy into electrical energy, and photochromic, which describes a material's ability to change color in response to light. Overall, the study of photoactive materials is a rapidly growing field, with numerous potential applications in areas ranging from energy conversion to biomedical engineering.