Dutch

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Etymology

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zepto- +‎ seconde

Pronunciation

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  • Audio:(file)
  • Hyphenation: zep‧to‧se‧con‧de

Noun

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zeptoseconde f (plural zeptoseconden or zeptosecondes)

  1. zeptosecond: 10-21 of a second

French

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Pronunciation

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