zeroth

/หˆzษชษ™ษนษ™สŠฮธ/

IPA: /Z IH1 R AO0 TH/

adjective
  1. 1

    In the initial position in a sequence whose elements are numbered starting at zero; the ordinal number corresponding to zero.

    โ€œThe zeroth order polynomial approximation is constant.โ€

  2. 2

    Corresponding to a position preceding the first.

    โ€œA and C are in equilibrium following the Zeroth Law of Thermodynamics.โ€

Source: https://en.wiktionary.org/wiki/zeroth