This comprehensive and authoritative dictionary provides clear definitions of units‎,‎ prefixes‎,‎ and styles of weights and measures within the Systeme International ‎(‎SI‎)‎‎,‎ as well as traditional‎,‎ and industry‎-specific units‎.‎ It also includes general historical and scientific background‎,‎ covering the development of the sequential definitions and sizing of units‎.‎ This new reference work will prove invaluable to professional scientists‎,‎ engineers‎,‎ technicians as well as to students and the general user‎.‎ * Over 1‎,‎600 clear and concise entries complete with historical background * Covers a broad range of disciplines‎,‎ including astronomy‎,‎ electromagnetics‎,‎ geology‎,‎ photography‎,‎ mathematics‎,‎ meteorology‎,‎ physics‎,‎ and temperature * Notes on associated terminology * Numerous tables‎,‎ including the geochronologic scale and the equation of time * Comprehensive coverage of the whole Systeme International