argon
/ˈɑrɡɑn/
noun
- A colorless, odorless, inert gas that is the third most abundant gas in Earth's atmosphere, used in light bulbs, welding, and as a protective atmosphere in industrial processes.
- Argon is often used in light bulbs to prevent the filament from burning out quickly.
- The museum displays ancient artifacts in cases filled with argon to slow down their decay.
- Welders use argon gas to shield the weld from oxygen and other contaminants.