fluorine
Cross references: 1. element flu.o.rine \'flu.(-*)r-.e-n, -*n\ n [F, fr. NL fluor] : a nonmetallic univalent halogen element that is normally a pale yellowis h flammable irritating toxic gas
Cross references: 1. element flu.o.rine \'flu.(-*)r-.e-n, -*n\ n [F, fr. NL fluor] : a nonmetallic univalent halogen element that is normally a pale yellowis h flammable irritating toxic gas