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An SI unit of length equal to 10−15 metres. Symbol: fm
Definition source: English Wiktionary via Wiktextract
Topics: metrology
Examples
- Holonyms: picometre < nanometre < micrometre < millimetre < centimetre < decimetre < metre < kilometre < megametre < gigametre < terametre < petametre < exametre < zettametre < yottametre < ronnametre < quettametre
- Meronyms: yoctometre < zeptometre < attometre
- The speed of light is about 0.3 femtometres per yoctosecond.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
a metric unit of length equal to one quadrillionth of a meter
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: femtometer, fermi
Antonyms: none provided
Broader terms: metric linear unit
Etymology tree Proto-Indo-European *pénkwe Proto-Germanic *fimf Proto-Indo-European *déḱm̥ Proto-Germanic *tehun Proto-Germanic *fimftehun Old Norse fimmtánder. Danish femtender. English femto- English metre English femtometre From femto- + metre.
Across languages
Translations
14 source translations are retained for this English entry.
-
Bulgarian:
фемтоме́тър
(femtométǎr)
— 10-15 of a metre
-
Chinese Mandarin:
飛米 /飞米
(fēimǐ)
— 10-15 of a metre
-
Czech:
femtometr
— 10-15 of a metre
-
French:
femtomètre
— 10-15 of a metre
-
German:
Femtometer
— 10-15 of a metre
-
Greek:
φεμτόμετρο
(femtómetro)
— 10-15 of a metre
-
Italian:
femtometro
— 10-15 of a metre
-
Japanese:
フェムトメートル
(femutomētoru)
— 10-15 of a metre
-
Korean:
펨토미터
(pemtomiteo)
— 10-15 of a metre
-
Portuguese:
femtômetro
— 10-15 of a metre
-
Romanian:
femtometru
— 10-15 of a metre
-
Spanish:
femtómetro
— 10-15 of a metre
-
Swedish:
femtometer
— 10-15 of a metre
-
Turkish:
femtometre
— 10-15 of a metre
