Franz Anton Mesmer was a famous historical figure in the field of medicine and psychology. He is known for his theory of animal magnetism, which he claimed had the power to heal illnesses. Today, there are several different terms that can be used to refer to Mesmer and his theories, including mesmerism, mesmerization, and Mesmerian. Other synonyms for Mesmer include the father of hypnosis, the founder of animal magnetism, and the pioneer of psychotherapy. While Mesmer's theories have undergone significant scrutiny and criticism over the years, his legacy continues to impact modern-day fields of medicine, psychology, and even popular culture.