The Collaborative International Dictionary of English v.0.48:

Adhesiveness \Ad*he"sive*ness\, n.
   1. The quality of sticking or adhering; stickiness; tenacity
      of union.
      [1913 Webster]

   2. (Phren.) Propensity to form and maintain attachments to
      persons, and to promote social intercourse.
      [1913 Webster]

WordNet (r) 3.0 (2006):

adhesiveness
    n 1: the property of sticking together (as of glue and wood) or
         the joining of surfaces of different composition; "the
         mutual adhesiveness of cells"; "a heated hydraulic press
         was required for adhesion" [syn: adhesiveness,
         adhesion, adherence, bond]