noun Download 🔗Share A form of lava flow of basaltic rock, usually dark-colored with a smooth or ropey surface. It is one of two chief forms of lava flow emitted from volcanoes of the Hawaiian type, the other form being aa. Examples : "The geologist showed us pictures of different lava flows, explaining how the smooth, rope-like texture was characteristic of pahoehoe. " geology material substance nature environment Chat with AIVocabulary GamePractice Reading