Definition of dyslexia noun from the Oxford Advanced American Dictionary

 

dyslexia

 noun
noun
NAmE//dɪsˈlɛksiə//
 
[uncountable]
 
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a slight disorder of the brain that causes difficulty in reading and spelling, for example, but does not affect intelligence
NAmE//dɪsˈlɛksɪk//
 
adjective He's dyslexic.
 
noun writing courses for dyslexics
See the Oxford Advanced Learner's Dictionary entry: dyslexia