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Definition(s) of “F”
f
abbreviation
• farad.
• farthing.
• father.
• fathom.
• feet.
• Grammar feminine.
• female.
• [in combination ] (in units of measurement) femto- (10 −15).
• filly.
• fine.
• (in textual references) folio.
• following.
• foot.
• form.
• Music forte.
• (in racing results) furlong(s).
• franc.
• from.
• Chemistry denoting electrons and orbitals possessing three units of angular momentum : f-orbitals. [ORIGIN: f from fundamental, originally applied to lines in atomic spectra.]
symbol
• focal length : apertures of f/5.6 to f/11. See also f-number .
• Mathematics a function of a specified variable : the value of f(x).
• Electronics frequency.
frequency |ˈfrēkwənsē|
noun ( pl. -cies)
1 the rate at which something occurs or is repeated over a particular period of time or in a given sample : shops have closed with increasing frequency during the period.
• the fact of being frequent or happening often.
• Statistics the ratio of the number of actual to possible occurrences of an event.
• Statistics the (relative) number of times something occurs in a given sample.
2 the rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light), usually measured per second. (Symbol: f or ν )
• the particular waveband at which a radio station or other system broadcasts or transmits signals.
ORIGIN mid 16th cent. (gradually superseding late Middle English frequence; originally denoting a gathering of people): from Latin frequentia, from frequens, frequent- ‘crowded, frequent.’
F 1 |ef| (also f)
noun ( pl. Fs or F's )
1 the sixth letter of the alphabet.
• denoting the next after E in a set of items, categories, etc.
• the sixth highest or lowest class of academic marks (also used to represent “Fail”).
• ( f) Chess denoting the sixth file from the left, as viewed from White's side of the board.
2 (usu. F) Music the fourth note of the diatonic scale of C major.
• a key based on a scale with F as its keynote.
F 2
abbreviation
• Fahrenheit : 60°F.
• failure.
• false.
• farad(s).
• Chemistry faraday(s).
• (in racing results) favorite.
• February.
• Fellow.
• female.
• fighter (in designations of U.S. aircraft types) : the F117 Stealth fighter.
• forint.
• (in auto racing) formula : an F1 driver.
• Franc(s).
• France.
• French.
• French.
symbol
• the chemical element fluorine.
• Physics force : F = ma.
Fahrenheit |ˈfarənˌhīt| (abbr.: F)
adjective [ postpositive when used with a numeral]
of or denoting a scale of temperature on which water freezes at 32° and boils at 212° under standard conditions.
noun (also Fahrenheit scale)
this scale of temperature.
ORIGIN mid 18th cent.: named after Gabriel Daniel Fahrenheit (1686–1736), German physicist.
farad |ˈfarəd; -ˌad| (abbr.: F)
noun
the SI unit of electrical capacitance, equal to the capacitance of a capacitor in which one coulomb of charge causes a potential difference of one volt.
ORIGIN mid 19th cent.: shortening of faraday . The term was originally proposed as a unit of electrical charge.
faraday |ˈfarəˌdā| (abbr.: F)
noun Chemistry
a unit of electric charge equal to Faraday's constant.
ORIGIN early 20th cent.: coined in German from the name of M. Faraday .
fluorine |ˈfloŏrˌēn; flôr-|
noun
the chemical element of atomic number 9, a poisonous pale yellow gas of the halogen series. It is the most reactive of all the elements, causing severe burns on contact with skin. (Symbol: F)
ORIGIN early 19th cent.: from fluor (see fluorspar ) + -ine 4 .