This compilation of nearly 8000 entries covers major disciplines of physics. Designed for professionals and students alike, it provides access to definitions of the latest terminology and concepts in the areas of acoustics, nuclear, atomic, particles and fields, plasmas, electromagnetism, quantum machanics, relativity, solid state, statistical mechanics and thermodynamics. Useful appendices containing conversion units, fundamental constants,SI units, the periodic table, symbols of physical quantities and the Greek alphabet are also provided.