organic chemistry 
noun [mass noun]
The branch of chemistry that deals with carbon compounds (other than simple salts such as carbonates, oxides, and carbides).The fellowships are awarded in synthetic organic chemistry and computational chemistry....
- The field of environmental chemistry calls on organic chemistry, biochemistry and a heck of a lot of biology.
- Dehydration, in the sense of formation of a water molecule through chemical reaction, is an important part of organic chemistry and biochemistry.