lava

Definitions

  • WordNet 3.6
    • n lava rock that in its molten form (as magma) issues from volcanos; lava is what magma is called when it reaches the surface
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Webster's Revised Unabridged Dictionary
  • Interesting fact: Craven Walker invented the lava lamp, and its contents are colored wax and water.
    • n Lava lä"vȧ The melted rock ejected by a volcano from its top or fissured sides. It flows out in streams sometimes miles in length. It also issues from fissures in the earth's surface, and forms beds covering many square miles, as in the Northwestern United States.☞ Lavas are classed, according to their structure, as scoriaceous or cellular, glassy, stony, etc., and according to the material of which they consist, as doleritic, trachytic, etc.
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Century Dictionary and Cyclopedia
    • n lava Molten rock which issues from a volcano during an eruption; the same when cooled and hardened. Lavas after hardening differ much in structure and texture. Some are entirely made up of an interlaced mass of crystals, others are entirely vitreous, as in the case of obsidian or volcanic glass. Others, again, have a partially glassy matrix, in which crystals are embedded—this last being the most common arrangement. Lavas also vary much in respect to compactness; some have an open cellular structure, while others are very compact. The specific gravity of lava varies in the different kinds from 2.37 to 3.22. The heavier or more basic kinds contain much magnetite or titaniferous iron, together with augite and olivin. These contain from 45 to 50 per cent, of silica, and to this class belong the basalts, dolerites, and nepheline and leucite lavas. The lighter or more acid varieties of lava contain from 60 to 80 per cent, or more of silica. In this class are included the trachytes and rhyolites, as well as most of the pitchstones, obsidians, and pumice. There are also varieties intermediate between the acid and the basic, such as augite andesite and hornblende andesite. Many volcanoes—at least during certain stages of their existence—throw out fragmentary materials only, and these are sometimes ejected during the same period of activity in which molten lava is poured forth. Among these fragmentary materials ashes, sand, lapilli, and even large angular masses occur. Portions of the molten material within the pipe of the crater are sometimes hurled aloft, and fall in the form of bombs, or in rough irregular masses, like furnace-slag. Some volcanoes consist entirely of these fragmentary materials; others are chiefly made up of lava which became consolidated after ejection; in many cases, however, the mass of the cone has been built up by alternations of fragmentary and fluid material, and the whole is frequently bound together by dikes and sheets of lava forced into cracks formed during the operation.
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Chambers's Twentieth Century Dictionary
    • n Lava lä′va the melted matter discharged from a burning mountain, that flows down its sides.
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Etymology

Webster's Revised Unabridged Dictionary
It. lava, lava, orig. in Naples, a torrent of rain overflowing the streets, fr. It. & L. lavare, to wash. See Lave
Chambers's Twentieth Century Dictionary
It. lava, a stream—L. lavāre, to wash.

Usage

In literature:

Then will come a volcanic eruption; you will have fire, stones, and lava enough.
"Recollections of the late William Beckford of Fonthill, Wilts and Lansdown, Bath" by Henry Venn Lansdown
We have finally abandoned the crust of lava and the road by which the lava ascended.
"A Journey to the Centre of the Earth" by Jules Verne
Here, as in Sicily, the old lava is overgrown with prickly pear and red valerian.
"Sketches and Studies in Italy and Greece, Vol III." by John Symonds
Here, as in Sicily, the old lava is overgrown with prickly pear and red valerian.
"Sketches and Studies in Italy and Greece, Complete" by John Symonds
Lava flows of recent date have covered a few.
"Archeological Investigations" by Gerard Fowke
A very bright sun made the glowing lava look dull; but a moderate steam rose from it into the pure air.
"Seeing Europe with Famous Authors, Vol VIII" by Various
You can't trail stock across Granite Ridge, nor them lava ledges.
"The Quirt" by B.M. Bower
And here I would remark, that the lavas of AEtna are very different from those of Vesuvius.
"The Knickerbocker, or New-York Monthly Magazine, February 1844" by Various
Here there are many craters and much basalt, or even lava; also hot springs.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3" by Various
In an instant the soil about them was white hot, bubbling lava.
"Invaders from the Infinite" by John Wood Campbell
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In poetry:

And he may shed his tears,
Who tears at will can shed,
Whilst the blood doth boil in his hollow heart,
Like the fiery lava, red.
"The Queen's Triumph" by Samuel Bamford
Een eiland werd mijn dor gemoed,
Een rots, met lava in den schoot;
Geen toorts ontsteekt men aan zijn gloed:
Zijn vuurvlam doodt!
"Byrons Zwanenzang" by Jan Jakob Lodewijk ten Kate
Then flamed the crater! And the flame took wing;
Furious and far the lava blazed around,
Until at last, on this same spot that King
His Herculaneum found!
"Arms And The Man - The Oaks And The Tempest" by James Barron Hope
Oh!... Scellerate
Aberrazioni!... Oh!... Mia povera mente!
Oh!... Accesa lava dei miei fervidi anni!
Deh'... Perdonate!... Io sono un pazzo!... Io piango
E son solo!...
"Meriggio" by Ferdinando Fontana
Forests, cities, bridges
Gone again in the bright trail of lava.
Naxos thousands of feet below the olive-roots,
And now the olive leaves thousands of feet below the
lava fire.
"Peace" by D H Lawrence
Peace congealed in black lava on the doorstep.
Within, white-hot lava, never at peace
Till it burst forth blinding, withering the earth;
To set again into rock
Grey-black rock.
"Peace" by D H Lawrence

In news:

The Lava Bears beat West Albany 3-1 for a first-round victory on Tuesday.
HONOLULU — A webcam shows that surface lava flows from Kilauea Volcano have been picking up speed across the abandoned Royal Gardens subdivision on the Big Island.
Scientists keeping close watch on lava .
Lava levels rise at Hawaii's Kilauea volcano.
Hawaii Volcano's Lava Lake Threatens to Overflow.
The lava lake inside Halema'uma'u crater, at the top of Mount Kilauea in Hawaii, is closer than ever to reaching the crater floor and spilling out on it, the US Geological Survey said.
Lava lake boils higher.
Lava planet' orbits nearby star.
What to Expect at Lava Barre's Exotic Dance Class.
Lava Lite Silhouette Features In Trademark Expo Exhibit.
Shoshone, Idaho (KMVT-TV) The Lost n Lava Cowboy Gathering is wrapping up in Shoshone.
The undulating waves of Lava , mottled mosaics of Juxy, and randomness of Prisma are printed on high-performance vinyl backed with polyester.
Run coming to Lava Club.
Lava Barre in Arlington offers five barre classes, each with a different focus.
(Space.com) Scientists have discovered what appears to be an alien planet just two-thirds the size of Earth, a heat-blasted world perhaps covered in molten lava , a new study reports.
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In science:

Examples in nature include the formation of sand dunes, lava flow, avalanches, and transport of sediments in rivers.
Surface Granular flows: Two Related Examples
It turns out to be simple enough to create random oracles: Geiger counters attached to radioactive sources (Gude, 1985)2 and Lava lamps3 are available through the internet to provide sources of genuine randomness, however these sources are limited to about 30 bytes per second.
The influence of parsimony and randomness on complexity growth in Tierra
Lava ; these are interesting and useful, but conceptually different ways of approaching VLSI design.
Function Interface Models for Hardware Compilation: Types, Signatures, Protocols
More imaginative approaches: Silicon Graphics produced a TRNG based on a lava lamp.
Random Numbers in Scientific Computing: An Introduction
Called “LavaRand,” the hardware would take images from the lava blobs inside a lava lamp.
Random Numbers in Scientific Computing: An Introduction
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