aa [ä′ä΄ ]
[Haw ʼaʼā]
a type of basaltic rock, usually dark-colored with a jagged surface, formed in large sheets from slow-moving lava: cf. PAHOEHOE

English World dictionary. . 2014.

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.