argon — English Dictionary

Noun

1. The chemical element (symbol Ar) with an atomic number of 18. The third most abundant gas in the Earth's atmosphere, it is a colourless, odourless, inert noble gas.

   Usage

   • Countable
   • Uncountable

2. An atom of this element.

   Usage

   • Countable

Noun

1. a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere

   Synonyms

   Aratomic number 18

   Broader terms

   noble gasinert gasargonon