chemistry in WordNet English dictionary

1. the way two individuals relate to each other
   "their chemistry was wrong from the beginning -- they hated each other"; "a mysterious alchemy brought them together"
   chemistry  interpersonal chemistry  alchemy 
   
2. the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
   chemistry  chemical science 
   
3. the chemical composition and properties of a substance or object
   "the chemistry of soil"
   chemistry