What Does Hemidiapente Mean?

The Greek term hemidiapente is used in music as a synonym for the interval of the diminished fifth, hemi meaning “half”, dia “over”, pente “five”. See also diatessaron, diapente and diapason. (Very) Select Bibliography Mattheson, Johann. Der vollkommene Capellmeister (Hamburg, 1739). Walther, Johann Gottfried. Musicalisches Lexicon (Leipzig, 1732).