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 - 15 dictionary results
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a⋅a

  [ah-ah]
Use aa in a Sentence
–noun
basaltic lava having a rough surface.
Also, a'a.
Compare pahoehoe.

Origin:
1855–60; < Hawaiian ʿaʿā
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AA

 
1. administrative assistant.
2. Alcoholics Anonymous.
3. antiaircraft.
4. author's alteration.

AA

 
Symbol.
1. a proportional shoe width size, narrower than A and wider than AAA.
2. the smallest proportional brassiere cup size.
3. a quality rating for a corporate or municipal bond, lower than AAA and higher than A.
4. Electricity. a battery size for 1.5 volt dry cells: diameter, 0.6 in. (1.4 cm); length, 2 in. (5 cm).
5. British. a designation for motion pictures certified as unsuitable for children under 14 unless accompanied by an adult. Compare A (def. 11), U (def. 5), X (def. 9).

a̅a̅

 
Symbol.
(in prescriptions) ana2.
Also, āa

Origin:
< Gk aná, with superscript bar repr. the nasal consonant

A.A.

 
1. Alcoholics Anonymous.
2. antiaircraft.
3. antiaircraft artillery.
4. Associate in Accounting.
5. Associate of Arts.
6. author's alteration.

a.a.

 
author's alteration.
Also, aa
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To aa
a·a or a'a   (ä'ä)   
n.  Lava having a rough surface.

[Hawaiian 'a'ā, to burn, aa.]
AA  
abbr.  

  1. Bible Acts of the Apostles

  2. Alcoholics Anonymous

  3. antiaircraft

  4. Associate in Arts

Acts of the Apostles   (ākts)   
pl.n.   (used with a sing. verb) Abbr. Ac or AA
See Table at Bible.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Financial Dictionary

AA

A grade assigned to a debt obligation by a rating agency to indicate a very strong capacity to pay interest and repay principal. Such a rating indicates only slightly lower quality than the top rating of AAA. Also called Aa.

Wall Street Words: An A to Z Guide to Investment Terms by David L. Scott.
Copyright © 2003. Published by Houghton Mifflin.
Cite This Source
Medical Dictionary

Main Entry: AA
Variant: also aa
Function: abbreviation
Etymology: Latin ana
of each —used at the end of a list of two or more substances in aprescription to indicate that equal quantities of each are to be taken

Main Entry: AA
Function: abbreviation
1 achievement age
2 Alcoholics Anonymous
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
Cite This Source
Medical Dictionary

AA abbr.

  1. Alcoholics Anonymous

  2. amino acid

  3. aminoacyl

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Abbreviations & Acronyms
aa

  1. Afar (language)

  2. author's alteration

AA

  1. Academy of Aphasia

  2. Acts of the Apostles

  3. administrative assistant

  4. adverse action

  5. Alcoa Inc.

  6. Alcoholics Anonymous

  7. Alzheimer's Association

  8. antiaircraft

  9. Armed Forces Americas (except Canada)

  10. Associate in Arts

  11. atomic absorption

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
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