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aa

aa

2 9.9
A rough, jagged type of lava made of broken, sharp pieces
  • noun
  • /ɑːˈɑː/
  • Specialized
translation icon : aa

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

lava
vsaa
124 2.0

Hot liquid rock that flows from a volcano and cools into solid rock

is a specific flow type with a rough jagged surface of clinkery fragments
basalt
vsaa
  • Specialized
8 7.2

A dark, heavy rock made when lava cools

is a subtype of that material notable for its rough clinkery surface

Compounds

AA
66 3.9

A group where people meet to help each other stop drinking alcohol

How Smooth

pahoehoe
  • Specialized
9.9
aa
  • Specialized
2 9.9

Surface Forms

aa singular
aas plural

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.