chlorine
[U] Uncountable
This term evokes a sharp, pungent scent and a chemical sterility. It is most commonly associated with the maintenance of hygiene in public spaces, specifically swimming pools and drinking water systems, where it acts as a powerful oxidizing agent to kill bacteria. In industrial contexts, the word carries a connotation of danger and toxicity due to its history as a chemical weapon. It is rarely used in casual conversation unless referring to the smell of a pool or the process of bleaching fabric.
Used to describe the chemical element or the substance in a pool regardless of quantity.