Volcanic /(?)/

Vol·can·ic

Volcanic

a.
  1. Of or pertaining to a volcano or volcanoes; as, volcanic heat.
  2. Produced by a volcano, or, more generally, by igneous agencies; as, volcanic tufa.
  3. Changed or affected by the heat of a volcano.

Phrases & Compounds
Volcanic bomb
a mass ejected from a volcano, often of molten lava having a rounded form.
Volcanic cone
a hill, conical in form, built up of cinders, tufa, or lava, during volcanic eruptions.
Volcanic foci
the subterranean centers of volcanic action; the points beneath volcanoes where the causes producing volcanic phenomena are most active.
Volcanic glass
the vitreous form of lava, produced by sudden cooling; obsidian. See Obsidian.
Volcanic mud
fetid, sulphurous mud discharged by a volcano.
Volcanic rocks
rocks which have been produced from the discharges of volcanic matter, as the various kinds of basalt, trachyte, scoria, obsidian, etc., whether compact, scoriaceous, or vitreous.