1. 
   stereoselectivity
   Specificity of chemical reactivity of stereoisomers based on their three-dimensional molecular structure. [2]
   Found op http://sis.nlm.nih.gov/enviro/iupacglossary/glossarys.html
   
   
2. 
   Stereoselectivity
   In chemistry, stereoselectivity is the property of a chemical reaction in which a single reactant forms an unequal mixture of stereoisomers during the non-stereospecific creation of a new stereocenter or during the non-stereospecific transformation of a pre-existing one. The selectivity arises from...
   Found op http://en.wikipedia.org/wiki/Stereoselectivity
   
   

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