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Abbreviation for field of vision, Fahrenheit; chemical symbol of fluorine. Abbreviation for filial generation, or the offspring resulting from a certain mating; the off spring from an initial mating are called collectively the first filial generation (F1), their offspring comprise the second filial generation (F2), etc.

The sixth letter of the English alphabet.

A letter; the sixth in the English alphabet.

The sixth letter of the English alphabet, is a labial articulation, formed by placing the upper teeth on the under lip, and accompanied with an emission of breath. F, in English, has one uniform sound, as in father after. Its kindred letter is v, which is chiefly distinguished from f by being more vocal or accompanied with more sound. As a numeral F stands for 40, and with a stroke placed over it 40,000. It often stands for fellow, as in F.R.S. F or Fa. in music, is the fourth note rising in this order in the gamut, ut, re, mi, fa.

the sixth letter of the English alphabet, is a labial articulation formed by the passage of breath between the lower lip and the upper incisive teeth. The figure of the letter F is the same as that of the Eolic digamma [F], to which it is also closely related in power. As a contraction it stands for fellow; as a numeral it denotes 40, and with a dash over it, 40,000. In music F is the fourth tone of the model scale. F sharp (F#) is a tone between F and G.