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AR US English

Accounts receivable

AR New Oxford Dictionary for Writers & Editors

Arkansas (postal abbreviation)

Ar US English

The chemical element argon

ar- US English

Variant spelling of ad- assimilated before r (as in arrive, arrogate).

-ar1 US English

(Forming adjectives) of the kind specified; relating to

-ar2 US English

Forming nouns such as pillar

-ar3 US English

Forming nouns such as bursar, vicar

-ar4 US English

Alteration of -er, -or (as in beggar, liar).

Ar New Oxford Dictionary for Writers & Editors

the chemical element argon

argon US English

The chemical element of atomic number 18, an inert gaseous element of the noble gas group. Argon is the most common noble gas, making up nearly one percent of the earth’s atmosphere

Ar in argon US English

The chemical element of atomic number 18, an inert gaseous element of the noble gas group. Argon is the most common noble gas, making up nearly one percent of the earth’s atmosphere

Harun ar-Rashid US English

(763–809), fifth Abbasid caliph of Baghdad 786–809

Jalal ad-Din ar-Rumi US English

(1207–73), Persian poet and Sufi mystic; founder of the order of whirling dervishes; also called Mawlana

argon New Oxford Dictionary for Writers & Editors

chemical element of atomic number 18, a noble gas

Harun ar-Rashid New Oxford Dictionary for Writers & Editors

(763–809), caliph of Baghdad 786–809

Jalal ad-Din ar-Rumi New Oxford Dictionary for Writers & Editors

(1207–73), Persian founder of the order of whirling dervishes

Ali ar-Rida in Mashhad US English

A city in northeastern Iran, close to the border with Turkmenistan; population 2,427,316 (2006). The burial place in ad 809 of the Abbasid caliph Harun ar-Rashid and in 818 of the Shiite leader Ali ar-Rida, it is a holy city of the Shiite Muslims. It is the second largest city in Iran