F

(noun) a degree on the Fahrenheit scale of temperature. Synonyms: degree Fahrenheit.

(noun) a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite. Synonyms: fluorine, atomic number 9.

(noun) 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. Synonyms: farad.

(noun) the 6th letter of the Roman alphabet. Synonyms: f.