- degree Fahrenheit, F - a degree on the Fahrenheit scale of temperature
--1 is a kind of degree
- fluorine, F, atomic number 9 - 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
--2 is a kind of chemical element, element; gas; halogen
--2 is a substance offluorite, fluorspar, fluor; fluorapatite; cryolite, Greenland spar - farad, F - 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
--3 is a kind of capacitance unit
--3 is a part of abfarad
--3 has parts: millifarad - F - the 6th letter of the Roman alphabet
--4 is a kind of letter, letter of the alphabet, alphabetic character
--4 is a member of Roman alphabet, Latin alphabet