1. A colourless and odourless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
   - Ar, atomic number 18

Derived forms: argons

Type of: argonon, chemical element, element, inert gas, noble gas

Part of: air

Encyclopedia: Argon

• inoculant
• inoculate
• inoculating
• inoculation
• inoculator
• inoculum
• inodorous
• inoffensive
• inoffensively
• inoperable
• inoperative
• inopportune
• inopportunely
• inopportuneness
• inordinate
• inordinately
• inordinateness
• inorganic
• inorganic chemistry
• inorganic compound
• inorganic phosphate
• inorganically
• inosculate
• inosculation
• inosine