Meaning : The science of matter. The branch of the natural sciences dealing with the composition of substances and their properties and reactions.
Synonyms : chemical science
Meaning : The chemical composition and properties of a substance or object.
Example :
The chemistry of soil.
Meaning : The way two individuals relate to each other.
Example :
Their chemistry was wrong from the beginning -- they hated each other.
A mysterious alchemy brought them together.
Synonyms : alchemy, interpersonal chemistry