(chemistry) The synthesis of a large number of structurally related compounds, especially in the pharmaceutical industry in an attempt to produce improved drugs.

(chemistry) the chemistry of organometallic compounds; their preparation, structure and reactions

(chemistry) The study of the effects of isotopic substitution on chemical compounds, especially on the kinetics of their reactions.

(chemistry, physics) The science that uses theories and techniques from physics to study chemical systems.

(chemistry) The application of chemical techniques to the solution of problems in nuclear physics, including the discovery of naturally occurring and synthetic radioactive elements and the results of nuclear fission.

(chemistry, physics) the application of quantum mechanics to chemical problems

(physics, chemistry) The study of the chemical changes that result from the absorption of ionizing radiation.

(chemistry) the application of chemical research techniques to the synthesis of pharmaceuticals

(chemistry) A philosophy of chemistry in which substances are generated quickly and reliably by joining small modular units together, as in nature.

(chemistry) An area of chemistry and chemical engineering focused on the designing of products and processes that minimize the use and generation of hazardous substances.