English dictionary



Hint: In most browsers you can lookup any word by double click it.

English noun: atomic number 9

1. atomic number 9 (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


SynonymsF, fluorine


Broader (hypernym)chemical element, element, gas, halogen


Substance meronymcryolite, fluor, fluorapatite, fluorite, fluorspar, Greenland spar









Based on WordNet 3.0 copyright © Princeton University.
Web design: Orcapia v/Per Bang. English edition: .
2024 onlineordbog.dk