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attosecond

Definition:

one quintillionth (10-18) of a second; 1/1000 of a femtosecond

Class:

time noun (time and temporal relations)

Plural:

attoseconds

Original source:

Princeton WordNet

Etymology:

atto- + second
(Source: Wiktionary)  [more]

Definition references

Wikipedia:

Attosecond

an SI unit of time equal to 10-18 of a second.. For context, an attosecond is to a second what a second is to about 31.71 billion years, or more than twice the age of the universe. The word "attosecond" is formed by the prefix atto and... (47 of 356 words)

en​.wikipedia​.org​/wiki​/Attosecond

Wiktionary:

attosecond [metrology] | attoseconds [plural] | as [synonym]

An SI unit of time equal to 10-18 seconds. (9 of 11 words)

en​.wiktionary​.org​/wiki​/attosecond

Collins Dictionary:

femtosecond

one thousandth of a nanosecond (5 of 277 words, 2 usage examples, pronunciation)

www​.collinsdictionary​.com​/dictionary​/english​/femtosecond

Oxford Dictionary:

femtosecond | fs [abbreviation] | femtoseconds [abbreviation, in full]

one quadrillionth of a second (5 of 25 words, pronunciation)

oxforddictionaries​.com​/definition​/english​/femtosecond

Merriam-Webster:

femtosecond

one quadrillionth of a second (5 of 18 words, pronunciation)

www​.merriam-webster​.com​/dictionary​/femtosecond

Etymology reference

Wiktionary:

attosecond [metrology] | attoseconds [plural]

Origin: atto- + second

en​.wiktionary​.org​/wiki​/attosecond

atto-

Origin: Danish atten ("eighteen").

en​.wiktionary​.org​/wiki​/atto-

second | seconds [plural] | seconded [past tense] | seconding [present participle]

Origin: Old French second, from Latin secundus ("following, next in order"), from root of sequor ("I follow"), from Proto-Indo-European *sekʷ- ("to follow"). | Old French seconde, from Medieval Latin secunda,... (28 of 48 etymology words)

en​.wiktionary​.org​/wiki​/second

Audio reference

the Free Dictionary:

attosecond

Audio: British English pronunciation of "attosecond"

www​.thefreedictionary​.com​/attosecond

Page last updated: 2013-06-26

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