1. Descriptive of a mistaken repetition of letters, words, or phrases, by a writer or someone who reproduces written material: "As a professional editor of short stories and novels, Sam had to be aware of dittographic contents when authors submit their creations to him."
2. Etymology: from Latin dittos, "double"; from dictus a form of dicere, "to say" + Greek graphien, "to scratch, to draw", then Greek graphikos, "write" and via Latin graphicus, graphe, "writing, drawing".