fluorine
- 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
fluorite
- n a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine
fluorocarbon
- n a halocarbon in which some hydrogen atoms have been replaced by fluorine; used in refrigerators and aerosols
fluorochrome
- n any of various fluorescent substances used in fluorescence microscopy to stain specimens