# chlorine

The Simple English Wikipedia has an article on:

sulphur or sulfur${\displaystyle \longleftarrow }$ 17 ${\displaystyle \longrightarrow }$argon

## Noun

 Plural none
1. (uncountable) A chemical element (symbol Cl) with an atomic number of 17.
2. (uncountable) Chlorine can mean something that contains chlorine, but is not chlorine as an element
Drinking water and swimming pool water is chlorinated to make it clean.