| femto- | SI and metric systems to signify one-quadrillionth (10-15). Origin: Danish and Norwegian femten, fifteen (05 Mar 2000) |
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| femto- |
a prefix meaning one quadrillionth (x10 -15 ), symbol f.
Ãâó: www.icknowledge.com/glossary/f.html
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| femto- |
10 -15 or one millionth of a billionth
Ãâó: www.comrad.org/glossary/glos2.htm
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