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Noun: ar
  1. A unit of surface area equal to 100 square meters
    - are
Noun: AR
  1. A state in south central United States; one of the Confederate states during the American Civil War
    - Arkansas, Land of Opportunity, Ark.
Noun: Ar
  1. A colourless and odourless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
    - argon, atomic number 18

Derived forms: ARs, ars

Type of: American state, area unit, argonon, chemical element, element, inert gas, noble gas, square measure

Part of: air, America, Confederacy, Confederate States, Confederate States of America, Dixie, Dixieland, hectare, South, the States, U.S., U.S.A., United States, United States of America, US, USA

Encyclopedia: Ar