[ ˌɪdɪə(ʊ)'sɪŋkrəsi ]
■ noun ( plural idiosyncrasies )
1》 a mode of behaviour or way of thought specific to an individual.
↘a distinctive or peculiar characteristic of something.
2》 Medicine an abnormal physical reaction by an individual to a food or drug.
Derivatives
idiosyncratic adjective
idiosyncratically adverb
Origin
C17: from Gk idiosunkrasia , from idios 'own' + sun 'with' + krasis 'mixture'.