aas

A.A.S.

1
Fellow of the American Academy.

Origin:
< New Latin Academiae Americanae Socius

Dictionary.com Unabridged

A.A.S.

2
1.
American Academy of Sciences.
2.
Associate in Applied Science.

aa

[ah-ah]
noun
basaltic lava having a rough surface.
Also, a'a.
Compare pahoehoe.


Origin:
1855–60; < Hawaiian ʿaʿā

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
aa1 (ˈɑːɑː)
 
n
a volcanic rock consisting of angular blocks of lava with a very rough surface
 
[Hawaiian]

aa2
 
abbreviation for
ana1

AA
 
abbreviation for
1.  Alcoholics Anonymous
2.  anti-aircraft
3.  Architectural Association
4.  (in Britain) Automobile Association
5.  (in Britain) Advertising Association
 
symbol for
6.  (in Britain, formerly) a film that may not be shown publicly to a child under fourteen

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
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.
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American Heritage
Science Dictionary
aa   (ä'ä)  Pronunciation Key 
A type of lava having a rough, jagged surface. It is relatively slow moving in its molten state, advancing in the form of massive blocks with fissured and angular surfaces that ride on a viscous interior. The blocks range in size between the size of a football and the size of a house. See Note at pahoehoe.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
American Heritage
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

AAS
  1. American Association of Suicidology

  2. American Astronautical Society

  3. American Astronomical Society

  4. anabolic-androgenic steroid(s)

  5. Associate in Applied Sciences

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