The Collaborative International Dictionary of English v.0.48:

Centrality \Cen*tral"i*ty\, n.; pl. Centralities.
   The state of being central; tendency towards a center.
   [1913 Webster]

         Meantime there is a great centrality, a centripetence
         equal to the centrifugence.              --R. W.
                                                  Emerson.
   [1913 Webster]