folie à deux

== English == === Alternative forms === folie a deux (without diacritics) folly à deux, folly a deux (rare) === Etymology === Borrowed from French folie à deux (“madness for/of two [people]”). === Pronunciation === IPA(key): /ˈfɒli ə ˈdɜː/ === Noun === folie à deux (plural folies à deux) A situation in which two people behave abnormally together in a way that neither of them would on their own. (psychiatry, strictly) A rare syndrome in which a symptom of psychosis (particularly a paranoid or delusional belief) is transmitted from one person to another. ==== Related terms ==== == French == === Pronunciation === IPA(key): /fɔ.li a dø/ === Noun === folie à deux f (plural folies à deux) folie à deux == Swedish == === Etymology === Unadapted borrowing from French folie à deux. === Noun === folie à deux c (uncommon) folie à deux ==== Synonyms ==== inducerat vanföreställningssyndrom (“induced delusional disorder”) symbiogen psykos (“symbiogenic psychosis”)