f
- n a degree on the Fahrenheit scale of temperature
- n 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
- n 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
- n the 6th letter of the Roman alphabet
f. d. roosevelt
- n 32nd President of the United States; elected four times; instituted New Deal to counter the Great Depression and led country during World War II (1882-1945)
f. g. banting
- n Canadian physiologist who discovered insulin with C. H. Best and who used it to treat diabetes(1891-1941)
f. scott fitzgerald
- n United States author whose novels characterized the Jazz Age in the United States (1896-1940)
f.i.s.c.
- n a secret federal court created in 1978 by the Foreign Intelligence Surveillance Act; responsible for authorizing wiretaps and other forms of electronic surveillance and for authorizing searches of suspected spies and terrorists by the Department of Justice or United States intelligence agencies
f clef
- n a clef that puts the F below middle C on the fourth line of a staff
f layer
- n the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission
f number
- n the ratio of the focal length to the diameter of a (camera) lens system