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Vinony

femtometre

noun

  1. one quadrillionth of a meter
L739245 on Wikidata ↗

Wiktionary

noun

Etymology: 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.

  1. An SI unit of length equal to 10⁻¹⁵ metres. Symbol: fm

    “Holonyms: picometre < nanometre < micrometre < millimetre < centimetre < decimetre < metre < kilometre < megametre < gigametre < terametre < petametre < exametre < zettametre < yottametre < ronnametre < quettametre”

    “Meronyms: yoctometre < zeptometre < attometre”