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foliage
foliage plant
foliar
-foliate
foliate
foliated
foliation
folic acid
folie à deux
folio
foliose
folk
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folie à deux

folie à deux [ fólli a d ] (plural folies à deux [ fólli a d ])


noun 
Definition:
 
shared psychiatric disorder: a psychiatric disorder with symptoms common to two people who are very close. Often only one person actually has a disorder, the other choosing to share the symptoms or delusions of the first.

[Late 19th century. < French, 'dual delusion']
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