noun
- a process for making copies of a letter, memorandum, etc., from a prepared gelatin surface to which the original writing has been transferred.
- a machine for making such copies.
verb (used with object)
- to copy with the hectograph.
noun
- Also called: copygraph a process for copying type or manuscript from a glycerine-coated gelatine master to which the original has been transferred
- a machine using this process