adjunctive

/AE1 JH AH0 NG K T IH0 V/
noun
  1. 1

    (grammar) a connector joining two components of the same weight, such as a coordinating conjunction

  2. 2

    A substance added as a supplement; often in the phrase "additives and adjunctives."

adjective
  1. 1

    Forming an adjunct

  2. 2

    Additional; neither basic nor primary

    โ€œadjunctive therapyโ€

  3. 3

    The property of two operations x and y, such that ax(ayb) = a, and ay(axb) = a

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