diapason

Meanings

1. The musical octave.
2. The range or scope of something, especially of notes in a scale, or of a particular musical instrument.
3. A tonal grouping of the flue pipes of a pipe organ.
4. One of the lowest strings on an archlute, theorbo, chitarrone, or similar bass lute-family instrument, usually unfrettable.
5. A harmonious outpouring of sound.

Etymology

Borrowed from Latin diapason, from Ancient Greek διαπασῶν (diapasôn), that is διά (diá, “through”) + πασῶν (pasôn, “all”) (χορδῶν (khordôn, “notes”)), “through all (notes)”.