"http://en.wikipedia.org/wiki/Fermi_(unit)"^^ . "fermi"@en . "fm" . . . . . "A71" . "The \\(\\textit{fermi}\\), or \\(\\textit{femtometer}\\) (other spelling \\(femtometre\\), symbol \\(fm\\)) is an SI unit of length equal to \\(10^{-15} metre\\). This distance is often encountered in nuclear physics as a characteristic of this scale. The symbol for the fermi is also \\(fm\\)."^^ . . . "1e-15"^^ . .