argon

/ˌɑrˈgɑn/

/ˈɑgɒn/

Other forms: argons

Definitions of argon

1. noun

   a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
   synonyms: Ar, atomic number 18

   type of:

   chemical element, element

   any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

   argonon, inert gas, noble gas

   any of the chemically inert gaseous elements of the helium group in the periodic table