(chemistry, physics) The change in the nuclear magnetic resonance frequency of a nucleus depending on its electronic environment; used in NMR spectroscopy to determine the structure of molecules.

The branch of engineering that deals with the design, construction and operation of industrial process plants, and the physical, chemical and biological processes to create substances or energy in a useful and economic form.

(medicine) an extreme sensitivity, or allergic reaction, to any of various chemical compounds present in the normal environment

Any noxious substance intended for use in military or police operations.

(chemistry) Any of several attractive forces that serve to bind atoms together to form molecules

All the methods and procedures involved in defending against attack by chemical agents.

plural of chemical element

plural of chemical compound

(chemistry) The amount of substance per unit volume, per unit time transformed in a reaction

(euphemistic, often humorous) Intoxicated by alcohol or recreational drugs.