- the molten, fluid rock that issues from a volcano or volcanic vent.
- the rock formed when this solidifies, occurring in many varieties differing greatly in structure and constitution.
Origin of lava
Examples from the Web for lava
Lava and ash fell for days; the sun was obliterated for three months.Book a Room for Two in a Santorini Cave
June 10, 2014
No longer would they have crazy adventures like campus-wide paintball and lava matches.‘Community’ Season Finale: Greendale Stares into the Abyss, Again
April 18, 2014
They were paid $50 to play a tiny Los Angeles speakeasy called The Lava Lounge—now The Woods.Cold War Kids on Faith, Hipster Detractors & Their Musical Evolution
April 17, 2013
So he turned to craftsmen living at the foot of Mt. Vesuvius who had pioneered a technique for working with lava stone.Subtle Sophistication: Bottega Veneta’s Tomas Maier
October 23, 2012
Communal distrust, in India, is lava always simmering beneath the skin.Gandhi Family Feud
April 12, 2009
I covered my face with my hat and rushed across the stream of lava.
They have all been at work like her, spouting ashes and pumice and rocks and lava.
The year 1800 saw the last of it on the lava law-rock of Thingvellir.The Little Manx Nation - 1891
He tickled the dun with his spurs and trotted along the crest of the lava ridge.The Coyote
In a circle about it stood the dark buttress of the lava sides.The Web of the Golden Spider</p>
Frederick Orin Bartlett
- magma emanating from volcanoes and other vents
- any extrusive igneous rock formed by the cooling and solidification of molten lava
Word Origin and History for lava
1750, from Italian (Neapolitan or Calabrian dialect) lava "torrent, stream," traditionally from Latin lavare "to wash" (see lave). Originally applied in Italian to flash flood rivulets after downpours, then to streams of molten rock from Vesuvius. Alternative etymology is from Latin labes "a fall," from labi "to fall." Lava lamp is attested from 1965, also lava light (reg. U.S., 1968, as Lava Lite).
- Molten rock that flows from a volcano or from a crack in the Earth. Most lava flows at a rate of a few kilometers per hour, but rates as high as 60 km (37 mi) per hour have been observed. Lava that contains abundant iron- and magnesium-rich components usually erupts with temperatures between 1,000°C and 1,200°C (1,832deg;F and 2,192°F). Lava that contains abundant silica- and feldspar-rich components usually erupts with temperatures between 800°C and 1,000°C (1,472deg;F and 1,832°F). Compare magma.
- The igneous rock formed when this substance cools and hardens. Depending on its composition and the rate at which it cools, lava can be glassy, very finely grained, ropelike, or coarsely grained. When it cools underwater, it cools in pillow-shaped masses. See also aa pahoehoe pillow lava.