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regioselectivity

re·gi·o·se·lec·tiv·i·ty [ rjō sə lek tívvətee ] (plural re·gi·o·se·lec·tiv·i·ties)


noun 
Definition:
 
natural tendency for chemical reaction: the natural tendency for a chemical reaction that could occur in a number of ways to follow one particular route

[Mid-20th century. <region]
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