zenzicubichttp://www.oed.com/dictionary/zenzicubic_adj%3Ftab%3Dmeaning_and_usezenzicubic, adj.
First published 2018

† zenzicubicadjective

Mathematics. rare. Obsolete.
  1. 1557–71
    Designating the sixth power or root of a number.
    1. 1557
      Zenzicubike, or Squared Cube.
      R. Recorde, Whetstone of Witte sig. Ki
    2. 1571
      The Zenzicubike roote of the product is your desire.
      T. Digges in L. Digges's Geometrical Practise: Pantometria iii. sig. V jv

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

zenzicubic, adj. was first published in 2018.