Definition of Femto

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femto-
prefix

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Femto definition was found in categories: Computer & Internet(1)  Science & Technology(1)  Encyclopedia(1)  

Femto Definition from Computer & Internet Dictionaries & Glossaries

Integrated Circuit Terminology
Femto
a prefix meaning one quadrillionth (x10-15), symbol f.


Femto Definition from Science & Technology Dictionaries & Glossaries

General Chemistry Glossary
femto
(f) Prefix used in the SI system meaning "multiply by 10-15". For example 22 fg means 22× 10-15 g.


Femto Definition from Encyclopedia Dictionaries & Glossaries

Wikipedia English - The Free Encyclopedia
Femto-
This article describes the SI prefix. For the manga character, see Berserk (manga).

Femto- is an SI prefix (symbol f) in the SI system of units denoting a factor of 10−15 or 0.000 000 000 000 001. Adopted in  1964 by the 12th Conférence Générale des Poids et Mesures , it comes from the Danish or Norwegian femten, Old Norse fimmtān, meaning fifteen.

Examples:

  • One femtosecond = 10−15 s
  • One femtojoule = 10−15 J
Note that the femtometre (10−15 of a metre) shares the same unit symbol (fm) with the older non-SI unit fermi, to which it is equivalent. The fermi, in honour of Enrico Fermi is often encountered in nuclear physics that is characteristic of this scale.

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