fluorine has definitions from the field of chemistry
[ noun ] (chemistry) 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


atomic_number_9 F

Used in print

(1961 Research Highlights of the National Bureau of...)

Another recent achievement was the successful development of a method for the complete combustion in a bomb_calorimeter of a metal in fluorine when the product is relatively non-volatile .