mediant
/ˈmɛdɪənt/; /ˈmɛdiənt/Definitions
1. noun
A middle note, typically the note halfway between two others, used especially in the calculation of chords and scales.
“The composer carefully selected the mediant to create a rich harmony.”
2. noun
A person who acts as a mediator or intervenes in a dispute.
“The mediant played a crucial role in resolving the conflict between the two parties.”