\U*nic"i*ty\, n. [L. unicus single. See {Unique}.]
The condition of being united; quality of the unique;
unification.

      Not unity, but what the schoolmen call unicity. --De
                                               Quincey.

      The unicity we strive not to express, for that is
      impossible, but to designate by the nearest analogy.
                                               --Coleridge.