intermediary

noun
  1. 1

    An agent acting as a mediator between sides that may disagree.

  2. 2

    An arranger of a contract or other agreement who is separate from the parties to the agreement

  3. 3

    One or several stages of an event which occurs after the start and before the end.

  4. 4

    A person or organisation in an intermediate position in a supply chain of goods or services

    โ€œThe intermediary between the manufacturer and retailer is the wholesalerโ€

adjective
  1. 1

    Intermediate.

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