Argon

/ˈɑːɹɡɒn/ noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 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. countable, uncountable
  2. 2
    a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere wordnet
  3. 3
    A single atom of this element. countable

Synonyms

All synonyms
arammoniaargon gasatomic number 18carbon dioxidechemical element ar

Example

More examples

"Helium, neon, argon, krypton, xenon and radon are noble gases."

Etymology

From Ancient Greek ἀργός (argós, “idle, lazy”), because of its inertness, + -on, used for all noble gases.

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