Definition of volcanic

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Volcanic (a.) Changed or affected by the heat of a volcano.

Lern More About Volcanic

Fiorite :: Fiorite (n.) A variety of opal occuring in the cavities of volcanic tufa, in smooth and shining globular and botryoidal masses, having a pearly luster; -- so called from Fiora, in Ischia..
Volcanity :: Volcanity (n.) The quality or state of being volcanic, or volcanic origin; volcanicity..
Agglomerate :: Agglomerate (n.) A mass of angular volcanic fragments united by heat; -- distinguished from conglomerate.
Etnean :: Etnean (a.) Pertaining to Etna, a volcanic mountain in Sicily..
Spherulite :: Spherulite (n.) A minute spherical crystalline body having a radiated structure, observed in some vitreous volcanic rocks, as obsidian and pearlstone..
Tufa :: Tufa () A friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria..
Volcanically :: Volcanically (adv.) Like a volcano.
Leucite :: Leucite (n.) A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash. It is found in the volcanic rocks of Italy, especially at Vesuvius..
Pearlstone :: Pearlstone (n.) A glassy volcanic rock of a grayish color and pearly luster, often having a spherulitic concretionary structure due to the curved cracks produced by contraction in cooling. See Illust. under Perlitic..
Scoria :: Scoria (n.) Cellular slaggy lava; volcanic cinders.
Volcanism :: Volcanism (n.) Volcanic power or action; volcanicity.
Sulphur :: Sulphur (n.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast beds mixed with gypsum and various earthy materials, from which it is melted out. Symbol S. Atomic weight 32. The specific gravity of ordinary octohedral sulphur is 2.05; of prismatic sulphur, 1.96..
Vulcanicity :: Vulcanicity (n.) Volcanicity.
Volcanic :: Volcanic (a.) Of or pertaining to a volcano or volcanoes; as, volcanic heat..
Volcanian :: Volcanian (a.) Volcanic.
Trass :: Trass (n.) A white to gray volcanic tufa, formed of decomposed trachytic cinders; -- sometimes used as a cement. Hence, a coarse sort of plaster or mortar, durable in water, and used to line cisterns and other reservoirs of water..
Volcanize :: Volcanize (v. t.) To subject to, or cause to undergo, volcanic heat, and to be affected by its action..
Fumarole :: Fumarole (n.) A hole or spot in a volcanic or other region, from which fumes issue..
Crystallite :: Crystallite (n.) A minute mineral form like those common in glassy volcanic rocks and some slags, not having a definite crystalline outline and not referable to any mineral species, but marking the first step in the crystallization process. According to their form crystallites are called trichites, belonites, globulites, etc..
Cone :: Cone (n.) Anything shaped more or less like a mathematical cone; as, a volcanic cone, a collection of scoriae around the crater of a volcano, usually heaped up in a conical form..
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