femto-
pref.（前缀）
语源
pref.（前缀）
- One quadrillionth (10-15):
毫微微：千万亿分之一(10-15)：
femtovolt.
毫微微伏特
语源
- From Danish
源自 丹麦语 - Norwegian femten [fifteen]
挪威语 femten [十五] - from Old Norse fimmtān * see penk we
源自 古斯堪的纳维亚语 fimmtān *参见 penk we
femto-
prefix
denoting 10–15 ⇒
femtometerf
Origin
from Danish or Norwegian femten fifteenfemto-
Word Origin
1
a combining form used in the names of units of measurement which are 10− 15 (one quadrillionth) smaller than the unit denoted by the base word.
Origin
< Danish, Norwegian femt(en) fifteen + -o-
Related Word
- femtometer
femto-a prefix denoting 10-15 of a given unit, as in femtometre. Symbol: f
[Danish femten fifteen]femto-
combining form
femtosecond
combining form
ETYMOLOGY International Scientific Vocabulary, from Danish or Norwegian femten fifteen, from Old Norse fimmtān; akin to Old English fīftēne fifteen
: one quadrillionth (10-15) part offemtosecond
femto-
combining form
- (used in units of measurement) denoting a factor of 10-15［用于度量单位］表示"10-15", “毫微微”, “千万亿分之一”：
-
femtosecond.
词源
from Danish or Norwegian femten 'fifteen'.
1961 Symbols, Units & Nomencl. Physics ( Internat. Union Pure &Appl. Physics) 5 (heading)The following prefixes should be used to indicate decimal fractions or multiples of a unit... Femto.
1963 Nature 16 Mar. 1056/1 The International Committee ..adopted two new prefixes for denoting sub⁓multiples of units. They are: femto, 10-15, symbol ‘f’. [ on Weights and Measures]
ORIGIN: from Danish or Norwegian femten fifteen: see -o-
femto-
combining form. one quadrillionth (10-15) of a _____: Femtogram = one quadrillionth of a gram.
[< Danish femten fifteen]
fem·to-
\¦fem(p)(ˌ)tō\ combining form
Etymology: International Scientific Vocabulary, from Danish or Norwegian femten fifteen (from Old Norse fimmtān) + -o- — more at fifteen
: one quadrillionth (10-15) part of
< femtosecond >
< femtosecond >
femto-
Etymology
From Danish femten (“fifteen”).
Prefix
| SI prefix | ||
| f | ||
| Previous: | atto- | |
| Next: | pico- | |
- In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10−15. Symbol: f.