a general term for difficulties with reading, writing, spelling, and understanding written or printed text, symbols, etc caused by a neurological disorder as opposed to similar learning difficulties exhibited by people with some form of brain injury or disease: compare alexia, aphasia, aphonia
dyslectic /disʹlektik/ adj and noun
dyslexic /-sik/ adj and noun
[scientific Latin dyslexia, from dys- + Greek lexis word, speech]