With thousands of entries, this dictionary provides a guide to the ever-growing vocabulary of science, with coverage of terms from physics, chemistry, biology, the earth sciences and mathematics. This dictionary is designed for use by senior school students )there were over 120,000 canidates in the main A-level science subjects in 2001 in England and Wales(, and by scientists and those working with scientists who need a guide to help them with terms outside their own areas of expertise. Fully illustrated with over 50 diagrams and line drawings, this text includes over 7000 entries explaining terms from Chemistry, Physics, Biology, the Earth Sciences, and Mathematics. Also included are references to the best and most helpful internet sites, a bibliography, and several useful appendices, for example on SI Units and the Periodic Table.