f

abbreviation

1》 Grammar feminine.

2》 femto- (10^-15).

3》 (in textual references) folio.

4》 Music forte.

5》 (in racing results) furlong(s).

6》 Chemistry denoting electrons and orbitals possessing three units of angular momentum. [f from fundamental, orig. applied to lines in atomic spectra.]

symbol

1》 focal length.

2》 Mathematics a function of a specified variable.

3》 Electronics frequency.