C c


    • US Pronunciation
    • US IPA
    • UK Pronunciation
    • UK IPA
    • [klawr-een, -in, klohr-]
    • /ˈklɔr in, -ɪn, ˈkloʊr-/
    • /ˈklɔː.riːn/
    • US Pronunciation
    • US IPA
    • [klawr-een, -in, klohr-]
    • /ˈklɔr in, -ɪn, ˈkloʊr-/

Definitions of chlorine word

  • uncountable noun chlorine Chlorine is a strong-smelling gas that is used to clean water and to make cleaning products. 3
  • noun chlorine a toxic pungent greenish-yellow gas of the halogen group; the 15th most abundant element in the earth's crust, occurring only in the combined state, mainly in common salt: used in the manufacture of many organic chemicals, in water purification, and as a disinfectant and bleaching agent. Symbol: Cl; atomic no: 17; atomic wt: 35.4527; valency: 1, 3, 5, or 7; density: 3.214 kg/m3; relative density: 1.56; melting pt: –101.03°C; boiling pt: –33.9°C 3
  • noun chlorine a greenish-yellow, poisonous, gaseous chemical element, one of the halogens, having a disagreeable odor and obtained by electrolysis of certain chlorides: it is used as a bleaching agent, in water purification, in various industrial processes, etc.: symbol, Cl; at. no., 17 3
  • noun chlorine a halogen element, a heavy, greenish-yellow, incombustible, water-soluble, poisonous gas that is highly irritating to the respiratory organs, obtained chiefly by electrolysis of sodium chloride brine: used for water purification, in the making of bleaching powder, and in the manufacture both of chemicals that do not contain chlorine, as ethylene glycol, and of those that do. Symbol: Cl; atomic weight: 35.453; atomic number: 17. 1
  • noun chlorine The chemical element of atomic number 17, a toxic, irritant, pale green gas. 1
  • noun chlorine chemical element: bleach 1

Information block about the term

Origin of chlorine

First appearance:

before 1800
One of the 42% newest English words
First recorded in 1800-10; chlor-1 + -ine2

Historical Comparancy

Parts of speech for Chlorine


chlorine popularity

A common word. It’s meaning is known to most children of preschool age. About 94% of English native speakers know the meaning and use the word.
Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".

chlorine usage trend in Literature

This diagram is provided by Google Ngram Viewer

Synonyms for chlorine

noun chlorine

  • bleach — If you bleach something, you use a chemical to make it white or pale in colour.
  • disinfectant — any chemical agent used chiefly on inanimate objects to destroy or inhibit the growth of harmful organisms.
  • halogen — any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals.

Top questions with chlorine

  • how many electrons does chlorine have?
  • what is chlorine?
  • how many valence electrons does chlorine have?
  • how many neutrons does chlorine have?
  • how long after putting chlorine in pool can you swim?
  • what is chlorine used for?
  • how much chlorine to shock pool?
  • who discovered chlorine?
  • how much liquid chlorine to add to pool?
  • when was chlorine discovered?
  • how to remove chlorine from water?
  • what color is chlorine?
  • what is used to test the concentration of chlorine sanitizer?
  • why is chlorine added to water?
  • what is non chlorine bleach?

See also

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