deep dyslexia
a form of acquired dyslexia characterized by semantic errors (e.g., reading parrot as canary), difficulties in reading abstract words (e.g., idea, usual) and function words (e.g., the, and), and an inability to read pronounceable nonwords. See also phonological dyslexia; surface dyslexia. [first described in 1973 by British neuropsychologists John C. Marshall (1939–2007) and Freda Newcombe (1925–2001)]