argon

argon is defined in Webster's Unabridged Dictionary (1913) with 1 sense. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.A substance regarded as an element, contained in the atmosphere and remarkable for its chemical inertness. Rayleigh and Ramsay.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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