1. (

• chemistry ,
• chemical_science

) the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions ;

2. (

• chemistry

) the chemical composition and properties of a substance or object; "the chemistry of soil" ;

3. (

• chemistry ,
• interpersonal_chemistry ,
• alchemy

) the way two individuals relate to each other; "their chemistry was wrong from the beginning ;