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acalculia (ay-kal-KYOO-lee-uh) noun

Inability or loss of the ability to perform arithmetic operations.

[New Latin, equivalent to a- + calcul- + -ia.]

"We concluded that there was indeed a specialised brain circuit for numbers in the left parietal lobe, and that damage to this circuit had caused Mrs Gaddi's acalculia. If we were right, there should be other patients in whom brain damage has spared this area, leaving mathematical abilities intact, but has affected brain regions that support language, memory and reasoning." Brian Butterworth, When brains don't count, The Independent - London, May 7, 1999.

This week's theme: Words for ailments and afflictions.


Be very circumspect in the choice of thy company. In the society of thine equals thou shalt enjoy more pleasure; in the society of thine superiors thou shalt find more profit. To be the best in the company is the way to grow worse; the best means to grow better is to be the worst there. -Francis Quarles (1592-1644)

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