Monomania
In 19th-century psychiatry, monomania (from Greek monos, "one", and mania, meaning "madness" or "frenzy") was a form of partial insanity conceived as single psychological obsession in an otherwise sound mind. == Types == Monomania may refer to: Erotomania (also known as De Clérambault's syndrome): Delusion that a particular person is in love with the patient.