volcanic

Etymology

From French volcanique, from volcan (“volcano”); and/or directly from volcan(o) + -ic.

adj

1. Of or pertaining to a volcano or volcanoes
   volcanic heat
   volcanic activity
2. Produced by a volcano, or, more generally, by igneous agencies
   volcanic tufa
   volcanic ash
3. Changed or affected by the heat of a volcano.
4. (figurative) Reminiscent of a volcano; explosive, violent, full of suppressed anger, energy etc.
   With that the system was complete, and ready to have its disastrous effect on Martin Luther's volcanic temper. 2009, Diarmaid MacCulloch, A History of Christianity, Penguin, published 2010, page 556

noun

1. A volcanic rock.
   The Ellesmere Island Volcanics are a Late Cretaceous volcanic group of volcanoes and lava flows in the Qikiqtaaluk Region of northern Ellesmere Island, Nunavut, Canada.