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a/o
A-OK
A & P
a.p.
A & P mix
a posteriori
a priori
A & R
A-road
A.S.P.C.A.
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A share
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a tempo
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aa
aa [  ]


noun 
Definition:
 
volcanic rock: solidified lava with a rough jagged surface and sharp angular features
[Mid-19th century. < Hawaiian a-'a]
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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