(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.

(informal, chemistry) Any of the traditional methods and techniques of chemistry, especially those of analytical chemistry that use gravimetric analysis or volumetric analysis rather than spectroscopy.

(informal, chemistry) Any chemical process or technique that is relatively low-tech, and does not require specialist equipment or skills, or precise measurement or control.

(mathematics, chemistry) The use of computation to predict the structure, properties and reactions of molecules

(pathology) Branch of pathology concerned with the chemical analysis of bodily fluids etc.

(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.