femtobarn en · 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 barn English femtobarn From femto- + barn.
Meanings
- A unit of area equal to a billionth of a millionth (10⁻¹⁵) of a barn
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| femtobarns | Number=Plur | lexicographic |