Dictionary.net

• di-tog'ra-fi, n. mechanical repetition of letters or words in copying a manuscript. [Gr. dittos, double, graphein, to write.]

1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson

• Copyist\'s mistaken repetition of letter, word, or phrase. Hence dittographic a. [Greek]

1919 - The concise Oxford dictionary of current English
By Sir Augustus Henry