zymogluconatehttp://www.oed.com/dictionary/zymogluconate_n%3Ftab%3Dmeaning_and_usezymogluconate, n.
First published 1921; not fully revised

zymogluconatenoun

  1. 1887–
    A salt of zymogluconic acid.
    Stressed as zymoˈgluconate.
    1. 1887
      The crystallised ammonium gluconate recently described by Volpert..had previously been obtained by the author [sc. L. Boutroux], and described by him as ammonium zymogluconate.
      Journal of Chemical Society vol. 52 468

Originally published as part of the entry for zymo-, comb. form

zymo-, comb. form was first published in 1921; not fully revised.