• WordNet 3.6
    • n diapason either of the two main stops on a pipe organ
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Webster's Revised Unabridged Dictionary
    • Diapason A standard of pitch; a tuning fork; as, the French normal diapason .
    • Diapason Concord, as of notes an octave apart; harmony. "The fair music that all creatures made . . . In perfect diapason ."
    • Diapason 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.
    • Diapason The entire compass of tones; the entire compass of tones of a voice or an instrument. "Through all the compass of the notes it ran,
      The diapason closing full in man."
    • Diapason (Gr. Mus) The octave, or interval which includes all the tones of the diatonic scale. Compare disdiapason.
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Century Dictionary and Cyclopedia
    • n diapason In music: In the ancient Greek system, the octave.
    • n diapason The entire compass of a voice or an instrument.
    • n diapason Correct tune or pitch.
    • n diapason A rule by which organ-pipes, flutes, etc., are constructed, so as to produce sounds of the proper pitch.
    • n diapason A fixed standard of pitch, as the French diapason normal, according to which the A next above middle C has 435 vibrations per second. See pitch.
    • n diapason A tuning-fork.
    • n diapason In organ-building, the two principal foundation-stops, called respectively the open diapason and the stopped diapason. The open diapason has metal pipes of large scale, open at the top, giving that full, sonorous, majestic tone which is the typical organ-tone. The stopped diapason has wooden pipes of large scale, stopped at the top by wooden plugs, giving that powerful, flute-like tone which is the typical flute-tone of the organ. The most important mutation-stops of the open-diapason species are the double open diapason, sounding the octave below the key struck; the principal or octave, sounding the octave above; and the fifteenth, sounding the second octave above. Those of the stopped-diapason species are the bourdon, sounding the octave below; the flute, sounding the octave above; and the piccolo, sounding the second octave above. Many varieties of each of these occur. See stop.
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Chambers's Twentieth Century Dictionary
    • n Diapason dī-a-pā′zon a whole octave: a harmony: a full volume of various sounds in concord: correct pitch: the two foundation-stops of an organ (open and stopped diapason)
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Webster's Revised Unabridged Dictionary
L., fr. Gr. diapasw^ni. e."h dia` pasw^n chordw^n symfoni`a the concord of the first and last notes, the octave); dia` through + pasw^n, gen. pl. of pa^s all: cf. F. diapason,. Cf. Panacea
Chambers's Twentieth Century Dictionary
Gr. dia, through, and pasōn, gen. pl. of pas, all—part of the Gr. phrase, dia pasōn chordōn symphōnia, concord through all the notes.


In literature:

Double Diapason (metal) 16 Piccolo 2 Open Diapason, No.
"The Recent Revolution in Organ Building" by George Laing Miller
Isolated fundamental tones are apt to be colourless and monotonous, like the diapason work on an organ.
"Spirit and Music" by H. Ernest Hunt
Not all the tones of great material nature's diapason could find this tortured spirit voice enough.
"An Old Meerschaum" by David Christie Murray
Great Open Diapason 8 ft. 3.
"Bell's Cathedrals: The Abbey Church of Tewkesbury" by H. J. L. J. Massé
The sound was deep, full-toned, a mighty diapason.
"Blow The Man Down" by Holman Day
During the night the rainstorm grew to a gale which rocked our night's home like a ship at sea to the music of heaven's grand diapasons.
"Lippincott's Magazine, Vol. 26, August, 1880" by Various
I did not think a woman's life could be tuned to so high a diapason.
"The Lady of Loyalty House" by Justin Huntly McCarthy
He had long since been aware of its resonant diapason, betokening a heavy sea; but the spectacle of it was one ever beautiful in his sight.
"The Destroying Angel" by Louis Joseph Vance
The diapason of hatred is pitched higher.
"Marie Antoinette and the Downfall of Royalty" by Imbert de Saint-Amand
Ballard and Bigelow rode ahead; and when the thunderous diapason of the river permitted, they talked.
"The King of Arcadia" by Francis Lynde

In poetry:

Colour had music's life to you.
The very grasses sang,
To you the cosmic organ peal
In diapason rang.
"Immortal Eve - IV" by Manmohan Ghose
Rose the organ's diapason,
Deep, majestical and wild,
And the singers sang a chorus
To the praise of Mary's child.
"Caleb's Vision" by Alfred Gibbs Campbell
He sees eternity with rapture thrilled;
He sees in one prolonged diapason
The organ of the universe, vehement, roll
For ever songs of praise to Him, the Sower.
"The Legend Of The Earth" by Sarah Anne Curzon
No hand, they diapason o'er,
Well skill'd I throw with sweep sublime;
For me, no academic lore
Has taught the solemn strain to pour,
Or build the polish'd rhyme.
"To My Lyre" by Henry Kirke White
Take this Sea, whose diapason knells
On scrolls of silver snowy sentences,
The sceptred terror of whose sessions rends
As her demeanors motion well or ill,
All but the pieties of lovers' hands.
"Voyages II" by Harold Hart Crane

In news:

(See the "Nunc Dimittis" in the June issue of The Diapason, page 10.
Part 1 was published in the October issue of The Diapason, pp 22–25, and Part 2 in the November issue, pp 26–29.

In science:

This effect is absent in the theory with dense packing of modes in all diapason of momenta since all states in momentum space are filled by the corresponding modes.
The Dynamic Quantization of Gravity and the Cosmological Constant Problem
At the same time the diapason in conference productivity is large in the beginning, and this is the reason why the curve goes up and down rather than increasing steadily.
Analysis of Computer Science Communities Based on DBLP
According to the results obtained by other authors lay in diapason from 4eV up to 24eV. It is supposed, that in this formula the impulses correspond neutrinos of the same sort.
Concerning the limit for neutrino mass