aa
- noun
- /ɑːˈɑː/
- Specialized
Examples
-
The gauge will operate for up to 200 hours on two AA batteries.
Academic text (1998) -
It contains seven rechargeable type AA batteries, which are supplied with the unit.
Academic text (1995) -
I have found that any tubular penlight holding two AA cells and fitted with a Type 243 bulb is the best choice for this purpose.
Academic text (1998) -
Packaged into a small and clean-looking box, iShower is powered by three AA batteries and offers up to 15 hours of streaming audio.
Blog text (31) -
280 lumens on two AA batteries, a simple mode interface, good size and weight (like a 2xAA mini Maglite).
Blog text (3) -
The volcanic eruption produced a river of aa lava that flowed down the mountainside, creating a rough and jagged terrain.
-
As the aa lava cooled, it formed large chunks and sharp edges, making the landscape difficult to traverse.
-
Hiking through the fields of aa lava was challenging due to the broken, clinkery surface that was hard on our boots.
Synonyms
Compounds
How Smooth
- Specialized
- Specialized
Surface Forms
Etymology
The word aa comes from the Hawaiian word a'a, which means 'rough' or 'stony'. That's why aa is used for lava that has a sharp, broken surface and is hard to walk on.