Femtometre
"Femtometre" in a Sentence (3 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.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.