Definition of rotograph in English:
rotograph
noun
historicalA black and white photographic print in which positive and negative tones are reversed, formerly used especially for reproductions of manuscripts and the printed page.
Pronunciation
rotograph
/ˈrəʊtə(ʊ)ɡrɑːf/ /ˈrəʊtə(ʊ)ɡraf/Origin
Late 19th century; earliest use found in The Trade Marks Journal. From roto- + -graph, after photograph.
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