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SI (Systeme Internationale) system of units
A coherent and rational system of units, derived from the m.k.s. system, which is used worldwide for scientific purposes. The SI system has seven base units and two dimensionsless (formerly known as supplementary) units – the radian and the steradian. All other units are derived from these basic nine. There are 18 derived units with special names.
Related category
• UNITS
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