MEDIANT (from the Lat. Medius, middle). I. One of the three most significant Regular Modulations of the Ecclesiastical Modes, ranking next in importance to the Dominant, or Reciting-Note. [See Modes, the Ecclesiastical; Modulations, Regular and Conceded.]
The normal position of the Mediant, in the Authentic Modes, lies as nearly as possible midway between the Final and the Dominant. It makes its nearest approach to the fulfilment of this condition, in Modes I, V, IX, and XIII, in which the Dominant...