English noun: fluorine | |||
1. | fluorine (substance) 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 | ||
Synonyms | atomic number 9, F | ||
Broader (hypernym) | chemical element, element, gas, halogen | ||
Substance meronym | cryolite, fluor, fluorapatite, fluorite, fluorspar, Greenland spar | ||