folie a deux

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 [fo-le´] (Fr.)
psychosis; insanity.
folie à deux mental disorder affecting two persons who share the same delusions; formally classified as shared psychotic disorder.
folie du pourquoi [doo-poor-kwah´] psychopathologic constant questioning.
folie gémellaire [zha″mĕ-lār´] psychosis occurring simultaneously in twins.

fo·lie à deux

(ah dyeuh),
a mental disorder in which a delusion develops in a person in a relationship with another person with an established delusion.
[Fr. two]

folie à deux

(fô-lē′ ä dœ′, fŏl′ē)
A condition in which two individuals who share a close relationship experience the same delusions or hallucinations as the result of a mental disorder such as schizophrenia affecting one or both of them. Also called shared psychotic disorder.

folie à deux

A disorder in which 2 closely related people share a delusional system; e.g., a mother who believes a son who is convinced he’s Jesus Christ

folie à deux

Induced psychotic disorder, shared psychotic disorder Psychiatry A condition in which 2 closely related people share a delusional system–eg, a mother who believes a son who believes that he is Jesus Christ
References in periodicals archive ?
Folie a deux versus genetically driven delusional disorder: Case reports and nosological considerations.
Un caso de folie a deux siempre llama la atencion, pues no afecta solo a un individuo, sino a dos o mas.
But the idea that Ford might have had some awareness of the folie a deux syndrome may not be as far-fetched as it first appears.
Diamonds never returned, but she was not a mere figment of two children's minds, or a folie a deux - for Enid also saw her - so what in Heaven's name was she?
Asi mismo, la incidencia de folie a deux parece ser subregistrada, por la falta de deteccion sistematica en los familiares de los pacientes psicoticos (15).
Musically new album Folie a Deux, which means "a madness shared by two", is a step-up and could well break them with a whole new genre of fans.
Folie a Deux was purchased from a private investor group chaired by Richard Peterson.
They can exercise that attraction if they are in this world of a folie a deux - "madness" shared by two people - where it is normal behaviour.
FIRST single from latest LP, Folie A Deux, pretends to be a straight-down-the-middle rock anthem, but their Emo roots are never far away.
Familiar with the phrase folie a deux - literally translated as "a madness shared by two"?
We had tried our two smaller tanks when custom-crushing at Folie a Deux before purchasing four more.