Biocompatible materials refer to substances that are compatible with living tissues and organisms, and are designed to be used in medical applications such as implants, prosthetics, drug delivery systems, and tissue engineering. These materials must be non-toxic, non-immunogenic, and non-carcinogenic to minimize adverse reactions when in contact with biological systems. Research in this area focuses on developing and testing new materials with improved biocompatibility, as well as understanding the interactions between these materials and living tissues to optimize their performance and safety. The goal of biocompatible materials research is to improve patient outcomes and quality of life by developing medical devices and treatments that are well-tolerated by the body.