Femto definition
One quadrillionth (10−15 ).
Femtovolt.
prefix
One quadrillionth part of; the factor 10-15
Femtosecond.
affix
Origin of femto
- < Dan femten, fifteen < ODan femtan < fem, five + -tjan, akin to OE -tyne, -teen
From Webster's New World College Dictionary, 5th Edition
- From Danish Norwegian femten fifteen from Old Norse fimmtān penkwe in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- From Danish femten (“fifteen”).
From Wiktionary