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4 definitions found
 for quaternion
From The Collaborative International Dictionary of English v.0.48 :

  Quaternion \Qua*ter"ni*on\, v. t.
     To divide into quaternions, files, or companies. --Milton.
     [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Quaternion \Qua*ter"ni*on\, n. [L. quaternio, fr. quaterni four
     each. See Quaternary.]
     1. The number four. [Poetic]
        [1913 Webster]
  
     2. A set of four parts, things, or person; four things taken
        collectively; a group of four words, phrases,
        circumstances, facts, or the like.
        [1913 Webster]
  
              Delivered him to four quaternions of soldiers.
                                                    --Acts xii. 4.
        [1913 Webster]
  
              Ye elements, the eldest birth
              Of Nature's womb, that in quaternion run. --Milton.
        [1913 Webster]
  
              The triads and quaternions with which he loaded his
              sentences.                            -- Sir W.
                                                    Scott.
        [1913 Webster]
  
     3. A word of four syllables; a quadrisyllable.
        [1913 Webster]
  
     4. (Math.) The quotient of two vectors, or of two directed
        right lines in space, considered as depending on four
        geometrical elements, and as expressible by an algebraic
        symbol of quadrinomial form.
        [1913 Webster]
  
     Note: The science or calculus of quaternions is a new
           mathematical method, in which the conception of a
           quaternion is unfolded and symbolically expressed, and
           is applied to various classes of algebraical,
           geometrical, and physical questions, so as to discover
           theorems, and to arrive at the solution of problems.
           --Sir W. R. Hamilton.
           [1913 Webster]

From WordNet (r) 3.0 (2006) :

  quaternion
      n 1: the cardinal number that is the sum of three and one [syn:
           four, 4, IV, tetrad, quatern, quaternion,
           quaternary, quaternity, quartet, quadruplet,
           foursome, Little Joe]

From Easton's 1897 Bible Dictionary :

  Quaternion
     a band of four soldiers. Peter was committed by Herod to the
     custody of four quaternions, i.e., one quaternion for each watch
     of the night (Acts 12:4). Thus every precaution was taken
     against his escape from prison. Two of each quaternion were in
     turn stationed at the door (12:6), and to two the apostle was
     chained according to Roman custom.
     

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