1. 
   Polyvalence
   In chemistry, polyvalence or multivalence refers to species that are not restricted to a distinct number of valence bonds. (Species with only one valence are univalent (monovalent)). For example, the Cs+ cation is a univalent or monovalent cation, whereas the Ca2+ cation is a divalent or polyvalent...
   Found op http://en.wikipedia.org/wiki/Polyvalence
   
   
2. 
   polyvalence
   [n] - the state of being polyvalent
   Found op http://www.webdictionary.co.uk/definition.php?query=polyvalence
   
   
3. 
   polyvalence
   polyvalency noun (chemistry) the state of having a valence greater than two
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=polyvalence
   
   
4. 
   polyvalence
   1) Multivalence 2) Multivalency 3) Polyvalency 4) State 5) The state of being polyvalent
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/polyvalence/1
   
   

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