This dictionary contains over 3000 commonly encountered terms and concepts in chemistry, including physical chemistry and biochemistry. It also includes many new terms reflecting recent advances in techniques, concepts and materials. The entries are written in a clear and explanatory style to provide straight-forward definitions and background information. This approach, combined with a cross-referencing system, enables the reader to place each entry in a broader scientific context. Line drawings are included whenever the meaning of a word can best be conveyed by means of a diagram, and a range of tables of scientific information is provided.