AR

🜇 U+1F707, 🜇 ALCHEMICAL SYMBOL FOR AQUA REGIA-2 ← 🜆 [U+1F706] Alchemical Symbols 🜈 → [U+1F708]

AR

1. (international standards) ISO 3166-1 alpha-2 country code for Argentina.

   Synonym: ARG (alpha-3)

2. (alchemy, archaic) abbreviation for aqua regia

   Synonym: 🜆

3. (alchemy, archaic) abbreviation for balneum arenae (sand bath)
4. (alchemy, archaic) abbreviation for lapis armenus (Armenian stone)

AR (not comparable)

1. (statistics) Initialism of autoregressive.

AR (countable and uncountable, plural ARs)

1. (countable, weaponry) an AR-15 personal semi-automatic rifle, M-16 assault rifle, M-4 carbine, derivative or related gun; the Armalite AR family and derivatives.
2. (countable, weaponry, informal) an assault rifle or automatic rifle.
3. (biochemistry) Initialism of androgen receptor.
4. (accounting, uncountable or plural only) Initialism of accounts receivable.
5. (sports, countable) area record: best achievement among those by persons from a given continent
6. (sports, US, countable) Abbreviation of American record., national record for the United States.
7. (crime) Initialism of armed robbery.
8. (computing, chiefly uncountable) Initialism of augmented reality.
9. (countable) Initialism of aspect ratio.
10. (fan fiction) Initialism of alternate reality.
11. (meteorology) Initialism of atmospheric river.
12. (emergency medicine) Initialism of artificial respiration.
13. (philately, postal service) Initialism of acknowledgment of receipt.
14. (law, politics) Initialism of assembly resolution.
15. Initialism of administrative rule or administrative regulation.
    • 1984 August 18, Karen J. Cox, “Women In Cages”, in Gay Community News, volume 12, number 6, page 7:

      As I was going over the AR book for my status change, I read several other ARs I believed the institution was violating so I decided to ask about them at the meeting.

• (gun): AK

AR

1. Postal abbreviation of Arkansas
2. Abbreviation of Arunachal Pradesh. (a state of India)

• (Arkansas): Ark. (standard, not postal, abbreviation)

• AR pupil

• 'RA, 'Ra, ra, RA, Ra

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AR

1. ISO 3166-2:CH code of Appenzell Ausserrhoden (canton)

AR

1. (Portugal) Initialism of Assembleia da República (“Assembly of the Republic, the unicameral parliament of Portugal”).
   • 2022 February 6, Paulo Portas, “Chega quer vice-presidente na AR. Como está a extrema-direita nos outros países da UE?”, in CNN Portugal‎^[1]:

     Foi uma das primeiras polémicas a sair das eleições legislativas: o Chega quer um lugar na vice-presidência da Assembleia da República - ao qual tem, tradicionalmente, direito, por ter sido a terceira força política mais votada - mas a esquerda ameaça vetar a proposta. Em Global, Paulo Portas explicou o que se passa noutros países europeus.

     (please add an English translation of this quotation)

   • 2022 February 11, Lusa, “BE quer explicações na AR de entidades envolvidas no processo eleitoral da emigração”, in SAPO‎^[2]:

• “AR” in Dicionário infopédia da Língua Portuguesa.

AR

1. Abbreviation of Arad, a county in Romania.