argon

ar·gon  (ärgn)

n. Symbol Ar

A colorless, odorless, inert gaseous element constituting approximately one percent of Earth's atmosphere, from which it is commercially obtained by fractionation for use in electric light bulbs, fluorescent tubes, and radio vacuum tubes and as an inert gas shield in arc welding. Atomic number 18; atomic weight 39.948; melting point -189.3°C; boiling point -185.9°C. See Table at element.

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[From Greek rgon, neuter of rgos, idle, inert : a-, without; see a-¹ + ergon, work; see werg- in Indo-European roots.]

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argon

Noun

Chem an unreactive odourless element of the rare gas series, forming almost 1 per cent of the atmosphere Symbol: Ar[Greek argos inactive]

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argon  (ärgn)

Symbol Ar

A colorless, odorless element in the noble gas group. Argon makes up about one percent of the atmosphere. It is used in electric light bulbs, fluorescent tubes, and radio vacuum tubes. Atomic number 18; atomic weight 39.948; melting point -189.2°C; boiling point -185.7°C. See Periodic Table.

Thesaurus

Noun

1.

argon - a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere Ar, atomic number 18 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 air - a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air"