quaternity


From The Collaborative International Dictionary of English v.0.48:

Quaternity \Qua*ter"ni*ty\, n. [LL. quaternitas, fr. L. quaterni
   four each: cf. F. quaternit['e].]
   1. The number four. [Obs.] --Sir T. Browne.
      [1913 Webster]

   2. The union of four in one, as of four persons; -- analogous
      to the theological term trinity.
      [1913 Webster]
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