argon

[ahr-gon] Origin

ar·gon

[ahr-gon]
noun Chemistry.
a colorless, odorless, chemically inactive, monatomic, gaseous element that, because of its inertness, is used for filling fluorescent and incandescent lamps and vacuum tubes. Symbol: Ar; atomic number: 18; atomic weight: 39.948.

Origin:
1890–95; < Greek, neuter of argós inactive, not working, idle, contraction of aergós equivalent to a- a-6 + érg(on) work + -os adj. suffix
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Argon is always a great word to know.
So is alkaline. Does it mean:
the condition existing when a chemical reaction and its reverse reaction proceed at equal rates
like or containing an alkali, which neutralize acids to form salts and turn red litmus paper blue, or having a pH value greater than 7
Collins
World English Dictionary
argon (ˈɑːɡɒn)
 
n
an extremely unreactive colourless odourless element of the rare gas series that forms almost 1 per cent (by volume) of the atmosphere. It is used in electric lights. Symbol: Ar; atomic no: 18; atomic wt: 39.948; density: 1.7837 kg/m³; freezing pt: --189.3°C; boiling pt: --185.9°C
 
[C19: from Greek, from argos idle, inactive, from a-1 + ergon work]

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Etymonline
Word Origin & History

argon
chemical element, 1894, from Gk. argon, neut. of argos "idle," from a- "without" + ergon "work" (see urge (v.)). So called by its discoverers, Baron Rayleigh and Sir William Ramsay, for its inert qualities.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

argon ar·gon (är'gŏn')
n.
Symbol Ar
A colorless, inert gaseous element constituting [approx] one percent of Earth's atmosphere, used in electric bulbs and fluorescent 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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
argon   (är'gŏn')  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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