atomic number 17

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a common nonmetallic element belonging to the halogens;
best known as a heavy yellow irritating toxic gas;
used to purify water and as a bleaching agent and disinfectant;
occurs naturally only as a salt (as in sea water)
• Syn:
chlorine, Cl
• Derivationally related forms:
chlorinate (for: chlorine)
• Hypernyms:
chemical element, element, gas, halogen
• Hyponyms:
radiochlorine
• Substance Holonyms:
sodium chloride, common salt