Webster
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Webster’s Revised Unabridged Dictionary · 1913

Copygraph

Cop′y·graph (·grȧf), n. A contrivance for producing manifold copies of a writing or drawing.

☞ The writing or drawing is made with aniline ink on paper, and a reverse copy transfered by pressure to a slab of gelatin softened with glycerin. A large number of transcripts can be taken while the ink is fresh.

Various names have been given to the process [the gelatin copying process], some of them acceptable and others absurd; hectograph, polygraph, copygraph, lithogram, etc. Knight.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.