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 F F /ˈɛf/

noun

  1. () A degree on the Fahrenheit scale of temperature  ( degree Fahrenheit , F )
    a degree on the Fahrenheit scale of temperature
  2. The 6th letter of the Roman alphabet  ( F , ef )
    the 6th letter of the Roman alphabet
  3. The capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates  ( F , farad )
    the capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates
  4. A nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite, cryolite or fluorapatite  ( atomic number 9 , F , fluorine )
    a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite, cryolite or fluorapatite