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F, f

[ef] /ɛf/
noun, plural F's or Fs, f's or fs.
1.
the sixth letter of the English alphabet, a consonant.
2.
any spoken sound represented by the letter F or f, as in fat, differ, or huff.
3.
something having the shape of an F .
4.
a written or printed representation of the letter F or f.
5.
a device, as a printer's type, for reproducing the letter F or f.

f

1.
firm1 .
2.
Photography. f-number.
3.
Music. forte2 .

f

1.
Symbol, Optics. focal length.

F

1.
Fahrenheit.
2.
female.
3.
Genetics. filial.
4.
firm.
5.
franc; francs.
6.
French.

F

Symbol.
1.
the sixth in order or in a series.
2.
(sometimes lowercase) (in some grading systems) a grade or mark that indicates academic work of the lowest quality; failure.
3.
Music.
  1. the fourth tone in the scale of C major or the sixth tone in the relative minor scale, A minor.
  2. a string, key, or pipe tuned to this tone.
  3. a written or printed note representing this tone.
  4. (in the fixed system of solmization) the fourth tone of the scale of C major, called fa.
  5. the tonality having F as the tonic note.
4.
(sometimes lowercase) the medieval Roman numeral for 40.
Compare Roman numerals.
5.
Mathematics.
  1. field.
  2. function (of).
6.
(sometimes lowercase) Electricity. farad.
7.
Chemistry. fluorine.
8.
(sometimes lowercase) Physics.
  1. force.
  2. frequency.
  3. fermi.
9.
Biochemistry. phenylalanine.

F-

Military.
1.
(in designations of aircraft) fighter:
F-105.

f.1

1.
(in prescriptions) make.
Origin of f.1
Latin
From the Latin word fac

f.2

1.
(in prescriptions) let them be made.
Origin
From the Latin word fīant

f.3

1.
(in prescriptions) let it be made; let there be made.
Origin
From the Latin word fiat

f.4

1.
(in the Netherlands) guilder; guilders.
Origin
From the Dutch word florin

f.5

1.
farad.
2.
farthing.
3.
father.
4.
fathom.
5.
feet.
6.
female.
7.
feminine.
8.
filly.
9.
fine.
10.
fluid (ounce).
11.
folio.
12.
following.
13.
foot.
14.
form.
15.
formed of.
16.
franc.
17.
from.
18.
Mathematics. function (of).

F.

1.
Fahrenheit.
2.
February.
3.
Fellow.
4.
forint.
5.
franc; francs.
6.
France.
7.
French.
8.
Friday.

f/

or f/, f:

Photography.
1.
f-number.

in f.

1.
in the end; finally.
Origin
From the Latin word in fīne

Weingartner

[vahyn-gahrt-nuh r] /ˈvaɪnˌgɑrt nər/
noun
1.
(Paul) Felix (Edler von Münzberg)
[poul fey-liks eyd-luh r fuh n mynts-berk] /paʊl ˈfeɪ lɪks ˈeɪd lər fən ˈmüntsˌbɛrk/ (Show IPA), 1863–1942, Austrian composer, conductor, and writer.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for f
Contemporary Examples
Historical Examples
British Dictionary definitions for f

f

/ɛf/
noun (pl) f's, F's, Fs
1.
the sixth letter and fourth consonant of the modern English alphabet
2.
a speech sound represented by this letter, usually a voiceless labio-dental fricative, as in fat

f

symbol
1.
(music) forte: an instruction to play loudly
2.
(physics) frequency
3.
(formerly in the Netherlands) guilder
4.
(maths) function (of)
5.
(physics) femto-
6.
(chess) See algebraic notation
Word Origin
(sense 3) from Dutch: florin

f

symbol
1.
f-number

F

symbol
1.
(music)
  1. a note having a frequency of 349.23 hertz (F above middle C) or this value multiplied or divided by any power of 2; the fourth note of the scale of C major
  2. a key, string, or pipe producing this note
  3. the major or minor key having this note as its tonic
2.
Fahrenheit
3.
Fellow
4.
(chem) fluorine
5.
Helmholtz function
6.
(physics) force
7.
franc(s)
8.
farad(s)
9.
(genetics) a generation of filial offspring, F1 being the first generation of offspring, F2 being the second generation, etc
abbreviation
10.
France (international car registration)

F-

abbreviation
1.
fighter: F-106

f.

abbreviation
1.
fathom(s)
2.
female
3.
(grammar) feminine
4.
(pl) ff., FF.. folio
5.
(pl) ff.. following (page)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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f in Medicine

F 1

The symbol for the element fluorine.

F 2
abbr.
Fahrenheit

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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f in Science
F  

  1. Abbreviation of Fahrenheit

  2. The symbol for farad.

  3. The symbol for fluorine.


fluorine
  (flr'ēn')   
Symbol F
A pale-yellow, poisonous, gaseous element of the halogen group. It is highly corrosive and is used to separate certain isotopes of uranium and to make refrigerants and high-temperature plastics. It is also added in fluoride form to the water supply to prevent tooth decay. Atomic number 9; atomic weight 18.9984; melting point -223°C; boiling point -188.14°C; specific gravity of liquid 1.108 (at boiling point); valence 1. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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