DIAPASON

diapason. diapason, (g) a concorde in musick of all parts

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diapason. Diapason, n. an octave in music, concord, unison

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Di′a‐pa″son (?), n. [[L., fr. Gr. διαπασω̑ν (i.e., ἡ διά πασω̑ν χορδω̑ν συμφονία the concord of the first and last notes, the octave); διά through + πασω̑ν, gen. pl. of πα̑σ all: cf. F. diapason. Cf. Panacea.]] 1. 1. (Gr. Mus.) The octave, or interval which includes all the tones of the diatonic scale.
2. 2. Concord, as of notes an octave apart; harmony.
The fair music that all creatures made . . . In perfect diapason. Milton. 3. 3. The entire compass of tones.
Through all the compass of the notes it ran, The diapason closing full in man. Dryden. 4. 4. A standard of pitch; a tuning fork; as, the French normal diapason.
5. 5. One of certain stops in the organ, so called because they extend through the scale of the instrument. They are of several kinds, as open diapason, stopped diapason, double diapason, and the like.