Impairment of the ability to read, often as the result of genetic defect or brain injury.
Webster's New World
Other Word Forms of Dyslexia
Origin of Dyslexia
Circa 1890, from New Latin dys- + lexia, from Ancient Greek δυσ- (dys-) expressing the idea of difficulty, and Ancient Greek λέξις (lexis, “diction”, “word”).
New Latin dys– Greek lexis speech (from legein to speak leg- in Indo-European roots)
From American Heritage Dictionary of the English Language, 5th Edition
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