diapason

Meaning

Noun

• The musical octave.
• The range or scope of something, especially of notes in a scale, or of a particular musical instrument.
• A tonal grouping of the flue pipes of a pipe organ.

Origin

• Borrowed from Latin diapason, from Ancient Greek διαπασῶν, that is διά + πᾶς (χορδῶν), “through all (notes)”.