Much of psychiatry's technical jargon has been taken over and rubbed the wrong way by laymen. Some of the most popular terms, correctly defined:
psychiatry. The science of healing diseases of the mind, a branch of medicine. (Psychiatrists must be M.D.s.)
alienist. An out-of-date word for psychiatrist.
psychology. A science that investigates and describes the mind. "Clinical psychology" investigates mental illness or maladjustment. (Psychologists need not be M.D.s.)
neurology. A branch of medicine that deals with diseases of the nerves, brain and spinal cord.
psychoneurosis (or neurosis). A form of mental disease, characterized by conflicting emotions and bad adjustment to environment. Symptoms: nervousness, attacks of anxiety,...