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 ar ar /ˈɑːr/

noun

  1. A unit of surface area equal to 100 square meters  ( ar , are )
    a unit of surface area equal to 100 square meters

 AR

  1. A state in south central United States; one of the Confederate states during the American Civil War  ( AR , Ark. , Land of Opportunity , Arkansas )
    a state in south central United States; one of the Confederate states during the American Civil War
      They went hiking in the beautiful forests of Arkansas.
    They went hiking in the beautiful forests of Arkansas.

 Ar

  1. A colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere  ( Ar , atomic number 18 , argon )
    a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
      Argon is an inert gas commonly used in light bulbs.
    Argon is an inert gas commonly used in light bulbs.