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The symbol for the element argon.

Chemical symbol, argon.

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The noun has one meaning:

Meaning #1: a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
  Synonyms: argon, atomic number 18


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geometric progression (mathematics)
geometric series (mathematics)
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Columbia Encyclopedia. The Columbia Electronic Encyclopedia, Sixth Edition Copyright © 2003, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/ Read more
Medical Dictionary. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company Read more
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