Definition from Wiktionary, the free dictionary
Jump to navigation Jump to search


English Wikipedia has an article on:


From Middle English quaternioun, from Late Latin quaterniō, from quaternī, ablative form of quater (four times) + -iōn.[1][2][3] The mathematics sense was coined by William Rowan Hamilton in 1843.



quaternion (plural quaternions)

  1. A group or set of four people or things.
    • 1526, Tyndale, William, The Bible, Acts XII, translation of The Bible:
      Then wer the dayes of unlevended breed, and when he had caught hym, he put him in preson, and delyvered hym to iiij. quaternions off soudiers to be kept, entendynge after ester to brynge hym forth to the people.
    • 1885, Roberts, Alexander; Donaldson, James; Coxe, Arthur Cleveland; Schaff, Philip, Nicene and Post-Nicene Fathers: Series II, volume 2, book 6, chapter 13, translation of Historia Ecclesiastica by Socrates of Constantinople:
      This quaternion of revilers has traduced Origen, but not on the same grounds, one having found one cause of accusation against him, and another another; and thus each has demonstrated that what he has taken no objection to, he has fully accepted.
    • 2004, Glenn, Jason, Politics and History in the Tenth Century: The Work and World of Richer of Reims, Cambridge: Cambridge University Press, →ISBN, page 140:
      We saw above that the fourth quire consists of ten folios, two of which (folios 29 and 31) Richer added to a quaternion (folios 23 to 28, 30, 32). Most of the folios Richer added to his manuscript supplement, elaborate, or amend text that he had already composed in the codex.
  2. A word of four syllables.
    • 1815, Scott, Sir Walter, chapter 13, in Guy Mannering:
      In his general deportment he was pompous and important, affecting a species of florid elocution, which often became ridiculous from his misarranging the triads and quaternions with which he loaded his sentences.
  3. (mathematics) A four-dimensional hypercomplex number that consists of a real dimension and three imaginary ones (i, j, k) that are each an independent square root of -1. They are commonly used in vector mathematics and in calculating the rotation of three-dimensional objects.
    • 2004, Eberly, David H., 3D Game Engine Architecture: Engineering Real-Time Applications with Wild Magic:
      The right-hand side of the quaternion equation requires scalar multiplication and quaternion addition.




Derived terms[edit]


See also[edit]

Further reading[edit]


  1. ^ quaternion” in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.
  2. ^ American Heritage Dictionary of the English Language, fourth edition
  3. ^ Concise Oxford English Dictionary, eleventh edition



quaternion m (plural quaternions)

  1. (mathematics) quaternion

Further reading[edit]