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Aa

(ä) [from a word for "water" of the same Indo-European root as Lat. aqua], name of many small streams of N Europe and Switzerland. Aa, or a derivative of it, is a component part of hundreds of European place names.

aa

(ä`ä): see lavalava
, molten rock that erupts on the earth's surface, either on land or under the ocean, by a volcano or through a fissure. It solidifies into igneous rock that is also called lava.
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aA

(electricity)

AA

(ordnance)

AA

Abbr. for the “Architectural Association, ” the largest school of architecture in England; address 34–36 Bedford Square, London, WC1B 3ES.

AA

(1) (Auto Answer) See modem.

(2) (Double A) A common single-cell battery used in myriad devices from flashlights to electronic equipment of all variety. Like its triple A (AAA) cousin, it provides 1.5 volts of DC power. When used in series, the voltage is multiplied. For example, four AA batteries yield 6 volts.
References in periodicals archive ?
Our successful integration of the Alizay mill will offer to MENA high quality Double A paper.
Double A showcased the brands HI Plus and Eagle, new to the region, at the event ending today (March 7) at the Dubai International Convention and Exhibition Center.
LOS ANGELES, April 9, 2008 /PRNewswire/ -- Double A, a paper and pulp company based in Thailand, today announced the introduction of their environmentally-friendly paper made from farmed trees into the U.
Thirawit Leetavorn, Double A Senior Executive Vice President.
After restarting the operation of paper machinery in June 2013, Double A Alizay's objective is to boost pulp production during the first half of 2015.
Double A Alizay is now producing and exporting high quality paper that matches the Double A quality standards to key markets in Europe, the Middle East and North Africa.
Production is expected to grow by 10% therefore demand for dissolving pulp will also rise, making China a key market to Double A.
Thirawit Leetavorn, Double A senior executive vice president said, "As one of the biggest paper manufacturers in Thailand, it is our responsibility to have a positive social and environmental impact.
Double A senior executive vice president Thirawit Leetavorn is a confirmed speaker in the session "Addressing Environmental Concerns" scheduled for Thursday, 25 October from 2:00 - 3:30 PM.
Double A booth on the other hand has enjoyed the heavy traffic and has welcomed a total of 500 visitors to its booth during the 4-day fair, 6% higher than the previous year.
Double A Paper-Tree, a special breed of hardwoodgrown between rice paddies (Khan-na) increases the income of farmers of up to THB 3,000 (USD 100), given the available Khan-na per rai (6.
Manila, Oct 19, 2011 - (ACN Newswire) - Paper from KHAN-NA, a unique sustainable tree farming program of Thailand-based premium quality paper maker Double A (www.