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Definitions
a metric unit of length equal to one quadrillionth of a meter
Word origin
From femto- + metre.
Used in a sentence
“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.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
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