Webster's English Dictionary

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chemistry

chem.is.try \'kem-*-stre-\ n 1: a science that deals with the composition, 
   structure and properties of s ubstances and of the transformations that 
   they undergo 2a: the composition and chemical properties of a substance 
   {the ~ o f iron} 2b: chemical processes and phenomena (as of an organism) 
   {blood ~>