• Webster's Revised Unabridged Dictionary
    • n Diplograph An instrument used for double writing, as one for producing embossed writing for the blind and ordinary writing at the same time.
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Century Dictionary and Cyclopedia
    • n diplograph A Swiss writing-apparatus for the use of the blind, consisting of lettered disks with mechanism to rotate them and to bring any letter desired in position to imprint it on a sheet of paper placed in the machine. It is practically a clumsy form of the type-writer.
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Webster's Revised Unabridged Dictionary
Gr. double + -graph,