femtosecond |
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| 1. | [ noun ] one quadrillionth of a second; one thousandth of a nanosecond | |
| Related terms: | time_unit picosecond attosecond | |
femtosecond |
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| 1. | [ noun ] one quadrillionth of a second; one thousandth of a nanosecond | |
| Related terms: | time_unit picosecond attosecond | |