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Definition of Femtometer
1. Noun. A metric unit of length equal to one quadrillionth of a meter.
Exact synonyms: Femtometre, Fermi
Generic synonyms: Metric Linear Unit
Group relationships: Micromicron, Picometer, Picometre
Generic synonyms: Metric Linear Unit
Group relationships: Micromicron, Picometer, Picometre
Definition of Femtometer
1. Noun. (alternative spelling of femtometre dot=:) A length of 10-15 of a meter, 1 quadrillionth of a meter. ¹
¹ Source: wiktionary.com