Definitions for: Mediant

[n] (music) the third note of a diatonic scale; midway between the tonic and the dominant

Webster (1913) Definition: Me"di*ant, n. [L. medians, p. p. of mediare to halve:
cf. It. mediante, F. m['e]diante.] (Mus.)
The third above the keynote; -- so called because it divides
the interval between the tonic and dominant into two thirds.

See Also: musical note, note, tone