mediant

me·di·ant  (md-nt)

n.

The third tone in a diatonic musical scale, determining the major or minor quality of the tonic chord.

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[Italian mediante, from Late Latin medins, mediant-, present participle of medire, to be in the middle, from Latin medius, middle; see medium.]

Thesaurus

Noun

1.

mediant - (music) the third note of a diatonic scale; midway between the tonic and the dominant musical note, note, tone - a notation representing the pitch and duration of a musical sound; "the singer held the note too long" music - an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner