Fully revised and updated, with over 4700 entries and over 200 additions to this edition, this dictionary covers all aspects of chemistry, from physical chemistry to biochemistry. The sixth edition boasts broader coverage in subject areas such as forensics, metallurgy, materials science, and geology, increasing the dictionary's appeal to students in these related fields. There are also biographical entries on key figures, highlighted entries on major topics such as polymers and crystal defects, and a chronology charting the main discoveries in atomic theory, biochemistry, explosives, and plastics.