acalculia
/ˌeɪkælˈkjuːlɪə/noun
mass noun
- Medicine loss of the ability to perform simple calculations, typically resulting from disease or injury of the parietal lobe of the brain【医】（尤指由于脑顶叶疾病或损伤而引起的）计算缺失, 失算症。
词源
early 20th cent.: from A-1'not' + Latin calculare 'calculate' + -IA1.