Biomaterials are materials that are designed and engineered to interact with biological systems for a specific purpose, such as medical devices, implants, tissue engineering, drug delivery systems, and regenerative medicine applications. These materials are typically biocompatible, meaning they do not elicit a harmful response from the body, and can promote tissue regeneration and integration. Biomaterials research focuses on developing new materials, improving existing materials, and understanding the interactions between materials and biological systems to advance healthcare technologies and treatments.