As the training of DOs and MDs became less distinct, some expressed concern that the unique characteristics of osteopathic medicine would be lost. Others welcomed the rapprochement and already considered modern medicine to be the type of medicine practiced by both "MD and DO type doctors." One persistent difference is the respective acceptance of the terms "allopathic" and "osteopathic." DO medical schools and organizations all include the word "osteopathic" in their names, and such groups actively promote an "osteopathic approach" to medicine. While "osteopathy" was a term used by its founder AT Still in the 19th century to describe his new philosophy of medicine, "allopathic medicine" was originally a derogatory term coined by Samuel Hahnemann to contrast the conventional medicine of his day with his alternative system of homeopathic medicine. Some authors argue that the terms "osteopathic" and "allopathic" should be dropped altogether, since their original meanings bear little relevance to the current practice of modern medicine.