Vi fant 3 definisjoner av femtosecond på engelsk.
Noun |
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| femtosecond - one quadrillionth (10^-15) of a second; one thousandth of a picosecond | ||
| time unit, unit of time a unit for measuring time periods | ||
| picosecond one trillionth (10^-12) of a second; one thousandth of a nanosecond | ||