Chlorine Definition

klôrēn, -ĭn
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
Webster's New World

(physics) The major stable isotope of chlorine, 3517Cl, having seventeen protons and eighteen neutrons; it amounts to about 76% of the element in nature.


(physics) A long-lived radioactive isotope of chlorine, 3617Cl, having seventeen protons and nineteen neutrons, and a half-life of 3x105 years; it can be used to date samples of groundwater.


(physics) The minor stable isotope of chlorine, 3717Cl, having seventeen protons and twenty neutrons; it amounts to about 24% of the element in nature.


Origin of Chlorine

  • Coined by Sir Humphry Davy from Ancient Greek χλωρός (khlōros, “pale green”)

    From Wiktionary

Find Similar Words

Find similar words to chlorine using the buttons below.

Words Starting With

Words Ending With