Physicochemical
Part of speech: adjective
Definition: Dependent on the joint action of both physical and chemical processes. Of or pertaining to physical chemistry.
Chemistry
Part of speech: noun
Definition: The branch of natural science that deals with the composition and constitution of substances and the changes that they undergo as a consequence of alterations in the constitution of their molecules.An application of chemical theory and method to a particular substance.The mutual attraction between two people; rapport.
Example sentence: There's two parts of leadership. You've got to be a good leader - you've got to be somebody that people want to emulate and care about the other people. But the other guys that you have have to accept their leadership. They have to respond to it. That's the chemistry that you never know how that is going to happen.