Diapason1. (n.) The octave, or interval which includes all the tones of the diatonic scale.
2. (n.) Concord, as of notes an octave apart; harmony.
3. (n.) The entire compass of tones.
4. (n.) A standard of pitch; a tuning fork; as, the French normal diapason.
5. (n.) 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.
Thesaurus Entries
English horn, accord, accordance, air, attune, attunement, bassoon, baton, block flute, bombard, bourdon, carry, cello, chime, chiming, chromatic scale, claribel, clarinet, clarion, compass, concentus, concert, concert flute, concord, concordance, consecutive intervals, consonance, consonancy, consort, cornet, cornopean, cromorna, cymbel, degree, descant, diatessaron, diatonic interval, diatonic semitone, dodecuple scale, dulciana, enharmonic diesis, enharmonic interval, enharmonic scale, euphony, fifth, flute stop, foundation stop, fourniture, fourth, gamba, gamut, gedeckt, gemshorn, great scale, half step, halftone, harmonic flute, harmonics, harmony, heavy harmony, homophony, hybrid stop, interval, koppel flute, larigot, lay, less semitone, major scale, measure, melodia, melodic interval, melodic minor, metronome, minor scale, mixture, monochord, monody, music stand, mutation stop, mute, nazard, note, oboe, octave, octave scale, organ stop, parallel octaves, pentatonic scale, piccolo, pitch pipe, plein jeu, posaune, principal, quint, quintaten, radius, range, rank, ranket, reach, reed stop, register, rhythmometer, rohr flute, scale, scope, second, semitone, sesquialtera, seventh, shawm, sixth, sonometer, spectrum, spitz flute, step, stick, stop, stopped diapason, stopped flute, strain, stretch, string diapason, string stop, sweep, symphony, synchronism, synchronization, temperament, third, three-part harmony, tierce, tone, tone measurer, tremolo, trombone, trumpet, tune, tuning, tuning bar, tuning fork, tuning pipe, twelfth, unda maris, unison, unison interval, unisonance, vibrato, viola, voix celeste, vox angelica, vox humana, warble, whole step, whole-tone scale