argon
nounUK /ˈɑːɡɒn/
US /ˈɑːrɡɑːn/
Argon is a gas in the air that has no color or smell and does not burn.
The light bulb is filled with argon so the wire inside lasts longer.
SYNONYMS
RELATED WORDS
OTHER MEANINGS
2. A chemical element with the symbol Ar and atomic number 18.
Argon makes up about one percent of Earth's atmosphere.
3. A gas used in welding and in some kinds of light bulbs.
The welder used argon to protect the hot metal from the air.
4. A colorless, odorless gas that does not easily react with other substances.
Because argon is so unreactive, it is called a noble gas.