Definify.com
Webster 1913 Edition
Volcanic
Vol-can′ic
,Adj.
[Cf. F.
volcanique
, It. vulcanico
.] 1.
Of or pertaining to a volcano or volcanoes;
as,
. volcanic
heat2.
Produced by a volcano, or, more generally, by igneous agencies;
as,
. volcanic
tufa3.
Changed or affected by the heat of a volcano.
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.
Webster 1828 Edition
Volcanic
VOLCAN'IC
,Adj.
1.
Pertaining to volcanoes; as volcanic heat.2.
Produced by a volcano; as volcanic tufa.3.
Changed or affected by the heat of a volcano.