zenzizenzichttp://www.oed.com/dictionary/zenzizenzic_adj%3Ftab%3Dmeaning_and_usezenzizenzic, adj. & n.
First published 2018

† zenzizenzicadjective & noun

Mathematics. rare. Obsolete.
  1. 1557–1690
    a. adj.Designating the fourth power or root of a number; b. n.the square of a square; the fourth power of a number.
    1. 1557
      Might rather haue taken .81. whiche is a Zenzizenzike nomber.
      R. Recorde, Whetstone of Witte sig. Hiii
    2. 1654
      For the whole being in numeration, Six thousand and five hundred sixty one, Its Zenzizenzick root I'll take.
      Ex Ungue Leonem sig. E
    3. 1655
      The fourth, a Biquadrat or squared square, anciently a Zenzi zenzick, figured thus zz now thus, aaaa, or for brevity, a4.
      T. Gibson, Syntaxis Mathematica Preface 10
    4. a1690
      The Zenzizenzike of 8 is 4096.
      S. Jeake, Λογιστικηλογία (1696) 200

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

zenzizenzic, adj. & n. was first published in 2018.