femtometer
English Thesaurus
1. a metric unit of length equal to one quadrillionth of a meter (noun.quantity)
| hypernym | : | metric linear unit, |
| definition | : | a linear unit of distance in metric terms (noun.quantity) |
| part meronym | : | micromicron, picometer, picometre, |
| definition | : | a metric unit of length equal to one trillionth of a meter (noun.quantity) |
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