FEMTOSECOND

femtosecond

(noun) one quadrillionth (10^-15) of a second; one thousandth of a picosecond

Source: WordNet® 3.1

Etymology

Noun

femtosecond (plural femtoseconds)

A unit of time equal to 0.000 000 000 000 001 seconds (i.e. 1x10^-15 seconds) and with symbol fs.

Source: Wiktionary

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