(uncountable) 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.

plural of chemistry

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

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

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

(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.

(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.

(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.

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

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