Ar

Ar

The symbol for the element argon.

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AR

abbr.

1. also A/R accounts receivable

2. Arkansas

3. army regulation

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ar ¹  (är)

n.

Variant of are².

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ar ²  (är)

n.

The letter r.

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[Middle English arre, from Late Latin er.]

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ar

(Electronics & Computer Science / Computer Science)

the Internet domain name for Argentina

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Ar

the chemical symbol for

(Chemistry / Elements & Compounds) argon

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AR

abbreviation for

1. (Placename) Arkansas

2. (Government, Politics & Diplomacy) Autonomous Region

3. Also A/R (Economics, Accounting & Finance / Accounting & Book-keeping) (in the US and Canada) accounts receivable

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Ar

The symbol for argon.

Thesaurus

Noun	1.	Ar - a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere argon, atomic number 18 chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter argonon, inert gas, noble gas - any of the chemically inert gaseous elements of the helium group in the periodic table air - a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air"
	2.	ar - a unit of surface area equal to 100 square meters are area unit, square measure - a system of units used to measure areas hectare - (abbreviated `ha') a unit of surface area equal to 100 ares (or 10,000 square meters)
	3.	AR - a state in south central United States; one of the Confederate states during the American Civil War Arkansas, Land of Opportunity Hot Springs National Park - a national park in Arkansas featuring ancient hot springs; bathing is said to have therapeutic effects U.S.A., United States, United States of America, US, USA, America, the States, U.S. - North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776 Confederacy, Confederate States, Confederate States of America, Dixie, Dixieland, South - the southern states that seceded from the United States in 1861 Fayetteville - a university town in northwestern Arkansas in the Ozarks Fort Smith - a town in western Arkansas on the Arkansas River at the Oklahoma border Hot Springs - a town in west central Arkansas; a health resort noted for thermal springs Jonesboro - a town in northeast Arkansas capital of Arkansas, Little Rock - the state capital and largest city of Arkansas in the central part of Arkansas on the Arkansas River Pine Bluff - a town in southeast central Arkansas on the Arkansas River Texarkana - a town in southwest Arkansas on the Texas border adjacent to Texarkana, Texas Arkansas River, Arkansas - a river that rises in the Rocky Mountains in Colorado and flows southeast through Kansas and Oklahoma and through Arkansas to become a tributary of the Mississippi River Ouachita, Ouachita River - a river that rises in western Arkansas and flows southeast into eastern Louisiana to become a tributary of the Red River Ozark Mountains, Ozark Plateau, Ozarks - an area of low mountains in northwestern Arkansas and southeastern Missouri and northeastern Oklahoma Saint Francis River, St. Francis River, Saint Francis, St. Francis - a tributary of the Mississippi River that rises in Missouri and flows southeastward through Arkansas White River, White - a tributary of the Mississippi River that flows southeastward through northern Arkansas and southern Missouri