APA Dictionary of Psychology

n. loss or impairment of the ability to write as a result of neurological damage or disorder. The specific forms of writing difficulties vary considerably but may include problems with spelling irregular or ambiguous words, writing numbers or particular letters, or performing the motor movements needed for handwriting. Agraphia generally is seen in aphasia, although there is considerable variability of writing ability within a given aphasia type. Also called dysgraphia. —agraphic adj.