Meaning & use
halogen
Any of a group of five reactive nonmetal elements, including chlorine, fluorine, and iodine.
See it in a sentence
Chlorine is a halogen commonly used to disinfect swimming pool water.
The old lamp used a halogen bulb that produced a bright, white light.
A note on using this word
The halogens occupy group 17 of the periodic table and readily form salts with metals.
Words with a similar meaning
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