argon
🇺🇸
/ˈɑːrɡɑːn/
🇬🇧
/ˈɑːɡɒn/
A colorless, odorless gas that is one of the noble gases. It is used in light bulbs to prevent the filament from burning out quickly.
Argon is used in light bulbs because it helps the filament last longer.