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Definition of siemens noun from the Oxford Advanced Learner's Dictionary

siemens

noun

/ˈsiːmənz/

/ˈsiːmənz/

(abbreviation S)

(physics)

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the standard unit for measuring how well an object conducts electricity
Word Origin1930s: named after K. W. von Siemens (1823-83).

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See siemens in the Oxford Advanced American Dictionary

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