Biomaterial is a specialized field in biomedical engineering that deals with the application of materials science and engineering principles to design, develop and evaluate materials used in medical implants and devices. It involves the study of biocompatibility, tissue engineering, drug delivery, and other aspects of material behavior in biological systems. A biomaterial engineer seeks to create materials that are compatible with the human body, have optimal mechanical properties, and can be safely used in medical applications. It is an interdisciplinary field that requires knowledge of materials science, chemistry, biology, and engineering principles.