aa

or a'a

[ ah-ah ]
/ ˈɑ ɑ /

noun

basaltic lava having a rough surface.

RELATED WORDS


Nearby words

  1. a2,
  2. a2 level,
  3. a3,
  4. a4,
  5. a5,
  6. aaa,
  7. aaaa,
  8. aachen,
  9. aaes,
  10. aaf

Compare pahoehoe.

Origin of aa

First recorded in 1855–60, aa is from the Hawaiian word ʿaʿā

A.A.S.

1

Fellow of the American Academy.

Origin of A.A.S.

1
From the New Latin word Academiae Americanae Socius

A.A.S.

2

American Academy of Sciences.
Associate in Applied Science.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for aas



British Dictionary definitions for aas

aa

1
/ (ˈɑːɑː) /

noun

a volcanic rock consisting of angular blocks of lava with a very rough surface

Word Origin for aa

Hawaiian

aa

2

abbreviation for

ana 1

AA

abbreviation for

Alcoholics Anonymous
anti-aircraft
Architectural Association
(in Britain) Automobile Association
(in Britain) Advertising Association

symbol for

(in Britain, formerly) a film that may not be shown publicly to a child under fourteen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for aas

AA

abbr.

Alcoholics Anonymous
amino acid
aminoacyl

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for aas

aa

[ ää ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.