mediator
//ˈmiː.di.eɪ.tər//
Noun
mediatorSingular
mediatorsPlural
1
A person who attempts to make people involved in a conflict come to an agreement; a go-between.
The mediator helped the two parties reach an agreement.
2
A substance or structure that transmits an effect or stimulus within the body.
Histamine acts as a chemical mediator in allergic reactions.