01 n. A contrivance for producing manifold copies of a writing or drawing; -- made obsolete by later developments in copying technology; see xero…
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A contrivance for producing manifold copies of a writing or drawing; -- made obsolete by later developments in copying technology; see xerography. See: xerography“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.