zincographhttp://www.oed.com/dictionary/zincograph_n%3Ftab%3Dmeaning_and_usezincograph, n.
First published 1921; not fully revised

zincographnoun

  1. 1888–
    A design or impression produced by zincography.
    1. 1888
      Reproduced in ‘zincograph’ by the aid of photography.
      Edinburgh Review January 231
    2. 1890
      Zincographs of these stones.
      Muniments of Royal Burgh of Irvine vol. I. Introduction p. xxxii

Originally published as part of the entry for zincography, n.

zincography, n. was first published in 1921; not fully revised.