1. 
   Isostere
   Isosteres are molecules or ions with the same number of atoms and the same number of valence electrons. Some examples of isoteres include: The isostere concept was formulated by Irving Langmuir in 1919, and later modified by Grimm. Friedrich Erlenmeyer extended the concept to biological systems in ...
   Found op http://en.wikipedia.org/wiki/Isostere
   
   
2. 
   isostere
   One of two or more atoms or molecules having the same electron arrangement; e.g., N2 and CO. ... Origin: iso-+ G. Stereos, solid ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?isostere
   
   
3. 
   isostere
   Type: Term Pronunciation: ī′sō-stēr Definitions: 1. One of two or more atoms or molecules having the same electron arrangement, N₂ and CO.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=45981
   
   

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