a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earths atmosphere

[ Syn: argon , argon , ar , ar , atomic number 18 , atomic number 18 ]

a unit of surface area equal to 100 square meters

[ Syn: are ]

a state in south central United States; one of the Confederate states during the American Civil War

[ Syn: arkansas , land of opportunity , ar ]