zinc-chromatehttp://www.oed.com/dictionary/zinc-chromate_n%3Ftab%3Dmeaning_and_usezinc chromate, n.
First published 1921; not fully revised

zinc chromatenoun

  1. 1851–
    A toxic, yellow, water-insoluble powder, ZnCrO4, used as a pigment.
    1. 1851
      The crystals..really consisted of ordinary zinc-sulphate containing small quantities of zinc-chromate intimately bound up with them.
      H. Watts, translation of L. Gmelin, Hand-book of Chemistry vol. V. xxviii. 48
    2. 1974
      Zinc yellow, a basic zinc chromate, is used as a corrosion-inhibiting primer on aircraft parts fabricated from aluminum or magnesium.
      Encyclopædia Britannica Macropædia vol. IV. 571/2

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

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