argon

noun

ar·​gon ˈär-ˌgän 

: a colorless odorless inert gaseous element found in the air and in volcanic gases and used especially in welding, lasers, and electric bulbs see Chemical Elements Table

Examples of argon in a Sentence

Recent Examples on the Web

The rain itself showed a photospheric signature (based on the silicon-to-sulfur ratio), while the hotter plasma around it had a coronal signature (based on calcium-to-argon). —Pranjal Malewar, New Atlas, 27 Oct. 2025

Scientific analysis by argon gas dating determines when molten rock solidified. —Literary Hub, 22 Oct. 2025

An ion engine works by using an inert gas as a propellant; often this gas is xenon, but Takahashi used argon. —Keith Cooper, Space.com, 16 Sep. 2025

Real-world tests The scientists tested THOR AI on several challenging copper, argon, and tin cases. —Atharva Gosavi, Interesting Engineering, 16 Sep. 2025

Word History

Etymology

Greek, neuter of argos idle, lazy, from a- + ergon work; from its relative inertness — more at work

First Known Use

1894, in the meaning defined above

Phrases Containing argon

• potassium-argon

Rhymes for argon

• anton
• axon
• baronne
• baryon
• baton
• boron
• buisson
• bygone
• capon
• cardon
• chiffon
• coupon

Kids Definition

argon

noun

ar·​gon ˈär-ˌgän 

: a colorless odorless element that is a gas found in the air and in volcanic gases and used especially in electric bulbs see element

Medical Definition

argon

noun

ar·​gon ˈär-ˌgän 

: a colorless odorless inert gaseous element found in the air and in volcanic gases and used especially in lasers and electric bulbs

—symbol Ar see Chemical Elements Table