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English
noun
:
attosecond
1.
attosecond
(time)
one quintillionth (10^-18) of a second; one thousandth of a femtosecond
Broader (hypernym)
time unit
,
unit of time
Part meronym
femtosecond
Based on WordNet 3.0 copyright © Princeton University.
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. English edition:
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.
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