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lava    音标拼音: [l'ɑvə]
n. 熔岩,火山岩

熔岩,火山岩

lava
n 1: rock that in its molten form (as magma) issues from
volcanos; lava is what magma is called when it reaches the
surface

Lava \La"va\ (l[aum]"v[.a]; 277), n. [It. lava lava, orig. in
Naples, a torrent of rain overflowing the streets, fr. It. &
L. lavare to wash. See {Lave}.]
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.
[1913 Webster]

Note: 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.
[1913 Webster]

{Lava millstone}, a hard and coarse basaltic millstone from
the neighborhood of the Rhine.

{Lava ware}, a kind of cheap pottery made of iron slag cast
into tiles, urns, table tops, etc., resembling lava in
appearance.
[1913 Webster]

60 Moby Thesaurus words for "lava":
aa, abyssal rock, ash, ashes, basalt, bedrock, block lava, brand,
brash, breccia, calx, carbon, charcoal, cinder, clinker, coal,
coke, conglomerate, coom, crag, dross, druid stone,
festooned pahoehoe, fume, gneiss, granite, igneous rock, limestone,
living rock, magma, mantlerock, metamorphic rock, monolith,
pahoehoe, pillow lava, porphyry, pudding stone, reek, regolith,
rock, ropy lava, rubble, rubblestone, sandstone, sarsen, schist,
scoria, scree, sedimentary rock, shelly pahoehoe, slag, smoke,
smudge, smut, soot, stone, sullage, talus, tufa, tuff


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  • Lava - Wikipedia
    The solid volcanic rock resulting from subsequent cooling of the molten material is often also called lava A lava flow is an outpouring of lava during an effusive eruption (An explosive eruption, by contrast, produces a mixture of volcanic ash and other fragments called tephra, not lava flows )
  • Lava | Types, Composition, Temperature, Facts | Britannica
    Lava, magma (molten rock) emerging as a liquid onto Earth’s surface The term ‘lava’ is also used for the solidified rock formed by the cooling of a molten lava flow
  • Hawaii Volcano: Kilauea Eruption Updates Lava Viewing (2026)
    Live Kilauea eruption status, where to see lava, Hawaii Volcanoes National Park tips, and volcanic activity updates for 2026
  • Lava Flows - U. S. National Park Service
    Red-hot lava oozing from a volcanic vent during an eruption and slowly, but unstoppably, spreading across the landscape is one of the most awe-inspiring natural phenomena on our active Earth
  • What Is Lava Made Of? | Ask An Expert
    What Is Lava Made Of? Looking down at a cooled lava flow, you see a black, glassy, vesicular (“spongy”) rock The black color comes from the magnesium and iron-rich minerals, which are present in almost all types of lava flows The glassy appearance means the lava cooled quickly
  • What is lava made of? | Volcano World | Oregon State University
    Lava is made up of crystals, volcanic glass, and bubbles (volcanic gases) As magma gets closer to the surface and cools, it begins to crystallize minerals like olivine and form bubbles of volcanic gases
  • Lava - New World Encyclopedia
    Lava is molten rock expelled by a volcano during an eruption (When the molten rock is beneath the Earth 's surface, it is called magma ) When first exuded from a volcanic vent, the hot lava is at temperatures ranging from 700 °C to 1,200 °C (1,300 °F to 2,200 °F)
  • What is Lava? | Volcano Glossary | Perlan
    At its core, lava is molten rock expelled by a volcano during an eruption It originates deep within the earth, where temperatures are high enough to melt rock When pressure builds up in the earth’s crust, this molten rock finds its way to the surface, erupting as lava
  • What is a lava? - The Institute for Environmental Research and Education
    Lava is molten rock that has erupted onto the Earth’s surface (or the surface of another planet or moon) This extrusive igneous rock, distinguished from magma (molten rock beneath the surface), solidifies upon cooling, forming various volcanic rock formations
  • LAVA Definition Meaning - Merriam-Webster
    The meaning of LAVA is molten rock that issues from a volcano or from a fissure in the surface of a planet (such as earth) or moon; also : such rock that has cooled and hardened





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