F sixth letter of the alphabet . The Greek letter corresponding to it, digamma, which probably represented a sound like w, disappeared before the classical period. In Western alphabets f has usually represented the voiceless labiodental fricative, as in the English fast. In musical notation F stands for a note in the scale. In chemistry F is the symbol of the element fluorine . Author not available, F. , The Columbia Encyclopedia, Sixth Edition 2007 ... Read more