folie à trois

== English == === Etymology === From French folie à trois (“madness of three (people)”). === Noun === folie à trois (uncountable) (psychiatry) A form of shared psychotic disorder in which three individuals have the same or similar delusional beliefs, usually by transference. ==== Related terms ==== folie à deux == French == === Pronunciation === IPA(key): /fɔ.li a tʁwa/ === Noun === folie à trois f (plural folies à trois) folie à trois