Related Overviews


'aa' can also refer to...


More Like This

Show all results sharing this subject:

  • Environmental Science


Show Summary Details

Quick Reference

Volcanic lava rock that is thick and porous and has a rough, jagged surface when it cools. It is a Hawaiian word, pronounced ah‐ah.

Subjects: Environmental Science.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.