diapason
[noun]
Synonyms: melody, air, descant, lay, measure, melisma, melodia, strain, tune, warble, range, gamut, scale, spectrum

[TahlilGaran] English Synonym Dictionary ▲

diapason noun

1. an organ stop that produces a full loud sound
   Word Originlate Middle English (denoting the interval of an octave): via Latin from Greek dia pasōn (khordōn) ‘through all (notes)’.

[TahlilGaran] English Dictionary ▲