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volcanic |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Volcanic \Vol*can"ic\, a. [Cf. F. volcanique It vulcanico.] 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. {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. From WordNet r 1.6 [wn]: 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: 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" [syn: {eruptive}]
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