chlorine

Từ điển Oxford Advanced Learner 8th

chlor·ine [chlorine chlorines] BrE [ˈklɔːriːn] NAmE [ˈklɔːriːn] noun uncountable (symb. Cl)
a chemical element. Chlorine is a poisonous greenish gas with a strong smell. It is often used in swimming pools to keep the water clean.

Word Origin:
early 19th cent.: named by Sir Humphrey Davy, from Greek khlōros ‘green’ -ine.

• Từ đồng nghĩa / Synonyms:
  Cl, atomic number 17