Symbol E. A prefix used in the metric system to denote 1018 times. For example, 1018 metres=1 exametre (Em).
A prefix used in the metric system to denote 1018 times. For example, 1018 metres = 1 exametre (Em).
A prefix indicating a multiple of 1018. In computing it has a value of 260 (1,152,921, 504,606,846,976). See also binary prefixes.
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