a type of lava circulation of basaltic stone, frequently dark-colored with a smooth or ropey surface. Its 1 of 2 primary kinds of lava flow emitted from volcanoes associated with the Hawaiian kind, the other type being aa.
A name offered in Hawaii (formerly the Sandwich isles) to lava having a relatively smooth or billowing area, in difference through the rough-surfaced lava, called aa.
Compact lava. The spongy or harsh lava is known as a-a.