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monomania
monomania Monomania is a historical psychiatric term for a supposed partial insanity in which disturbance was thought to be limited to a particular set of ideas or delusions rather than the whole mind.
Monomania is a historical psychiatric term for a supposed partial insanity in which disturbance was thought to be limited to a particular set of ideas or delusions rather than the whole mind. In later usage it was largely abandoned because such cases were seen as belonging to more specific conditions, especially paranoia and other psychoses.