First attested in 1604, in modern sense since 1665, from Old French idiosyncrasie, from Ancient Greek ἰδιοσυγκρασία (idiosunkrasia, “one’s own temperament”), from ἴδιος (idios, “one’s own”) + σύν (sun, “together”) + κρᾶσις (krasis, “temperament”).
- IPA: /ˌɪd.i.əʊˈsɪŋ.krə.si/, X-SAMPA: /%Id.i.@U"sIN.kr@.si/
- IPA: /ˌɪdi.əˈsɪŋkɹəsi/
idiosyncrasy (plural idiosyncrasies)
- A behavior or way of thinking that is characteristic of a person.
- A language or behaviour that is particular to an individual or group.
- (medicine) A peculiar individual reaction to a generally innocuous substance or factor.
- A peculiarity that serves to distinguish or identify.
- He mastered the idiosyncrasies of English spelling.
Derived terms 
way of behaving or thinking
language or behaviour particular to an individual or a group
individual reaction to a generally innocuous substance
a peculiarity that serves to distinguish or identify
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Translations to be checked
See also