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Related to idiot savant: Savant syndrome
n. pl. idiot savants
Often Offensive A person with savant syndrome; a savant.
[French : idiot, idiot + savant, learned.]
idiot savant(ˈiːdjəʊ sæˈvɑ̃; ˈɪdɪət ˈsævənt)
n, pl idiots savants (ˈiːdjəʊ sæˈvɑ̃) or idiot savants
(Psychiatry) 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]
id•i•ot sa•vant(ˈɪd i ət səˈvɑnt, sæ-; Fr. i dyoʊ saˈvɑ̃)
n., pl. idiot savants, Fr. id•iots sa•vants (i dyoʊ saˈvɑ̃)
a mentally defective person with an exceptional skill or talent in a special field, as a highly developed ability to play music or to do arithmetic calculations.
[1925–30; < French: literally, learned idiot]