Wordnet 3.0
ADJECTIVE (3)
1.
relating to or produced by or consisting of volcanoes;
- Example: "volcanic steam"- Example: "volcanic islands such as Iceland"- Example: "a volcanic cone is a conical mountain or hill built up of material from volcanic eruptions"2.
explosively unstable;
- Example: "a volcanic temper"3.
igneous rock produced by eruption and solidified on or near the earth's surface;
rhyolite or andesite or basalt;
- Example: "volcanic rock includes the volcanic glass obsidian"
The Collaborative International Dictionary of English v.0.48:
Volcanic \Vol*can"ic\, a. [Cf. F. volcanique, It. vulcanico.]
1. Of or pertaining to a volcano or volcanoes; as, volcanic
heat.
[1913 Webster]
2. Produced by a volcano, or, more generally, by igneous
agencies; as, volcanic tufa.
[1913 Webster]
3. Changed or affected by the heat of a volcano.
[1913 Webster]
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.
[1913 Webster]
WordNet (r) 3.0 (2006):
volcanic
adj 1: relating to or produced by or consisting of volcanoes;
"volcanic steam"; "volcanic islands such as Iceland"; "a
volcanic cone is a conical mountain or hill built up of
material from volcanic eruptions"
2: explosively unstable; "a volcanic temper"
3: igneous rock produced by eruption and solidified on or near
the earth's surface; rhyolite or andesite or basalt;
"volcanic rock includes the volcanic glass obsidian"
Moby Thesaurus II by Grady Ward, 1.0:
49 Moby Thesaurus words for "volcanic":
agitable, bursting, combustible, detonating, edgy, emotional,
emotionally unstable, eruptive, excitable, explodable, explosible,
explosive, fierce, fiery, fulminating, furious, hasty,
high-mettled, high-spirited, high-strung, highly emotional, hot,
hot-tempered, hotheaded, impetuous, inflammable, irascible,
irritable, mettlesome, nervous, passionate, peppery, perturbable,
prickly, quick, quick-tempered, sensitive, short-tempered,
simmering, skittish, spunky, startlish, stormy, tempestuous,
tornadic, touchy, vehement, violent, wild