VOLBORTHITE Vol"borth*ite, n. Etym: [So named after Volborth, who first discovered it.] (Min.)
Defn: A mineral occurring in small six-sided tabular crystals of a green or yellow color. It is a hydrous vanadate of copper and lime.
VOLCANIAN
Vol*ca"ni*an, a.
Defn: Volcanic. [R.] Keats.
VOLCANIC
Vol*can"ic, a. Etym: [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.
VOLCANICALLY
Vol*can"ic*al*ly, adv.
Defn: Like a volcano.