F

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F,

sixth letter of the alphabetalphabet
[Gr. alpha-beta, like Eng. ABC], system of writing, theoretically having a one-for-one relation between character (or letter) and phoneme (see phonetics). Few alphabets have achieved the ideal exactness.
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. 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 notationmusical notation,
symbols used to make a written record of musical sounds.

Two different systems of letters were used to write down the instrumental and the vocal music of ancient Greece. In his five textbooks on music theory Boethius (c.A.D. 470–A.D.
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 F stands for a note in the scale. In chemistry F is the symbol of the element fluorinefluorine
, gaseous chemical element; symbol F; at. no. 9; at. wt. 18.9984; m.p. −219.6°C;; b.p. −188.14°C;; density 1.696 grams per liter at STP; valence −1. Fluorine is a yellowish, poisonous, highly corrosive gas.
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f

(physics)
Notation representing the Coriolis parameter.

F

(electricity)
(chemistry)

class A, B, C, D, E, F

A classification applied to fire doors, fire windows, roof coverings, interior finishes, places of assembly, etc., to indicate gradations of fire safety. See fire-endurance, fire-door rating.

F

Abbr. for “Fahrenheit.”
References in periodicals archive ?
I disagree, however, that embracing these other aspects of your advisory role means we need to throw out the three F's.
A cashless exchange or swap can be used to increase F's shares in ABC, defer gain on appreciated previously acquired ISOs, and avoid cash outlay.
And when the family became increasingly concerned about her condition the weekend of Mrs F's death and demanded a doctor be called, staff at the hospital said none was available.
The ombudsman's report said: "While I am unable to conclude that had such an examination been carried out this could have changed the tragic outcome of Mrs F's death.
Mr F's utter nakedness, his helplessness and confusion about what's happening to him, become almost intolerable, even as we remain bound to him with awe and pity.
Stella Hall, NGI's creative director, said: "It promises to be a truly world-class show and a fitting celebration and culmination of Groupe F's work here this month.
55) Weis explains that 'rash' means to cut sideways like a boar's tusks, notes that it was obsolete by 1599, and suggests that F's 'stick' was a prosaic modernization.
In this way, the scientists produced a series of micrometer-sized neon F's.
The main effect for confederate gender and all interactions were tested and found to be nonsignificant (all F's [less than] 1.
Deliveries of the 787 have been halted since the F's January 16 grounding order for Boeing's newest model, which came after two incidents involving lithium-ion batteries that smouldered and emitted fumes.
F's stock has appreciated more than E's stock in Example 5 above.