aa — meaning in English
Irish → English · translate English → Irish instead
English meaning
- aa noun A type of volcanic lava that cools into a rough, jagged, broken-up surface, as opposed to smooth pahoehoe lava.
Senses
aa is used for these senses in English:
- aa (volcanology) A form of lava flow associated with Hawaiian-type volcanoes, consisting of basaltic rock, usually dark-colored with a jagged and loose, clinkery surface. Compare pahoehoe. [From 19th c.]