femtosecond
fem·to·se·cond
noun
1.
one quadrillionth of a second; one thousandth of a nanosecond
Origin
From femto- + second.
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Parts
Part of
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.