Of or pertaining to a volcano or volcanoes / Produced by a volcano, or, more generally, by igneous agencies / Changed or affected by the heat of a volcano.

A volcanic rock.

plural of volcanicity

plural of volcanic

The quality or state of being volcanic. / The level of power of a volcano.

By means of a volcano. / (figuratively) In a volcanic (explosive) manner.

volcanic

plural of volcan

(transitive) To expose to volcanic heat.

(archaic) The quality or state of being volcanic, or of volcanic origin.