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Word: femtosecond (lookup in dictionary) (lookup stats)
Dates: during 2000-2009
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Usage:

...apparatus is called a femtosecond laser because it emits pulses of light in extremely short bursts—the equivalent of a millionth of a billionth of a second...

Author: By Risheng Xu, CONTRIBUTING WRITER | Title: Harvard Researchers Create Revolutionary Laser Scapel | 11/25/2003 | See Source »

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