promoter

/P R AH0 M OW1 T ER0/
noun
  1. 1

    One who promotes, particularly with respect to entertainment events or goods.

  2. 2

    The section of DNA that controls the initiation of RNA transcription as a product of a gene.

  3. 3

    An accelerator of catalysis that is not itself a catalyst.

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