elution noun. 
[ɪ'lu:ʃ(ǝ)n, ɪ'lju:-] E17.[Late Latin elutio(n-), formed as ELUTE: see -ION.]1.  Washing to remove impurity. Now 
rare or 
obsolete. 
E17.2.  The action or process of eluting; removal of adsorbed material. 
E20.  [TahlilGaran] English Dictionary ▲