a type of basalticrock, usually dark-colored with a jagged surface, formed in large sheets from slow-moving lava. It is one of two chief forms of rock emitted from volcanoes of the Hawaiian type, the other being pahoehoe.
AA
AA ("double A"), one of the standard sizes for dry cell batteries
This page expands a two-letter combination or a three-letter abbreviation/acronym (TLA). It aims to include all uses.
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Example Usage of AA
demaciel: Horario de Almoco, AA!!!
AeroSlave: hey AA my drivers side window fell down its either off track or the motors shot.think your hubby can take a look this weekend?