argon
/ˈɑːɹɡɒn/ noun
Forms argons
- noun 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.
- noun (countable) An atom of this element.
Synonyms
Etymology
From Ancient Greek ἀργός (argós, “idle, lazy”), because of its inertness, + -on, used for all noble gases.
Webster’s 1913
- noun A substance regarded as an element, contained in the atmosphere and remarkable for its chemical inertness. Rayleigh and Ramsay.
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “argon”, CC BY-SA 4.0. Details