While you are correct regarding the current clinical interpretation of "schizophrenic", the root of the word is the greek "skhizein", which literally means "to

While you are correct regarding the current clinical interpretation of "schizophrenic", the root of the word is the greek "skhizein", which literally means "to split". When the word was introduced into psychology, then, it meant "to split the mind". The word seeped into common usage because of its etymology. It was probably helped along by the common conflation with multiple personality disorder, but that doesn't make it wrong to use the word in this manner. If anything, the discipline of psychology is at fault for abusing the word, isn't it?