Here you will find one or more explanations in English for the word Duotype.
Also in the bottom left of the page several parts of wikipedia pages related to the word Duotype and, of course, Duotype synonyms and on the right images related to the word Duotype.
Duotype
Duotype Du"o*type, n. [L. duo two + type.] (Photoengraving)
A print made from two half-tone plates made from the same
negative, but etched differently.
Meaning of Duotype from wikipedia
