A physician whose practice is limited to a particular branch of medicine or surgery, especially one who is certified by a board of physicians, A person who devotes himself to a particular branch of a profession, science, or art; one who has a special knowledge of some particular subject_ thus, ophthalmologists, neurologists, or gynecologists are specialists in medicine, an expert who is devoted to one occupation or branch of learning, adjective_ UK Specialised

A medical establishment run by several specialists working in cooperation and sharing the same facilities, A place where such instruction occurs, a healthcare facility for outpatient care