|idiot savant (ˈiːdjəʊ sæˈvɑ̃, ˈɪdɪət ˈsævənt)|
|—n , pl idiots savants, idiot savants|
|a person with learning difficulties who performs brilliantly at some specialized intellectual task, such as giving the day of the week for any calendar date past or present|
|[C19: from French: knowledgeable idiot]|
idiot savant (sā-vänt')
n. pl. idiot savants
A mentally retarded person who exhibits genius in a highly specialized area, such as mathematics.