Chemical affinity

from The Collaborative International Dictionary of English v.0.48

Chemical \Chem"ic*al\, a.
   Pertaining to chemistry; characterized or produced by the
   forces and operations of chemistry; employed in the processes
   of chemistry; as, chemical changes; chemical combinations.
   [1913 Webster]

   {Chemical attraction} or {Chemical affinity}. See under
      {Attraction}.
      [1913 Webster]