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attosecond

noun
at·​to·​sec·​ond | \ ˈa-(ˌ)tō-ˌse-kənd How to pronounce attosecond (audio) , -kənt\

Definition of attosecond

: one quintillionth (10−18) of a second An attosecond is to a second what a second is to the age of the universe. — IEEE Spectrum

Examples of attosecond in a Sentence

Recent Examples on the Web

 Researchers have created light pulses lasting just 53 attoseconds using high-speed lasers. — David Labrador, Scientific American, "Units of Time Stretch from Here to Eternity," 25 Jan. 2012

First Known Use of attosecond

1962, in the meaning defined above

History and Etymology for attosecond

atto- + second entry 4

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