lava
[ lah-vuh, lav-uh ]
/ ˈlɑ və, ˈlæv ə /
noun
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
1740–50; < Italian, orig. Neapolitan dialect: avalanche < Latin
lābēs a sliding down, falling, akin to
lābī to slide
Words nearby lava
Example sentences from the Web for lava
British Dictionary definitions for lava
lava
/ (ˈlɑːvə) /
noun
magma emanating from volcanoes and other vents
any extrusive igneous rock formed by the cooling and solidification of molten lava
Word Origin for lava
C18: from Italian (Neapolitan dialect), from Latin
lavāre to wash
Scientific definitions for lava
lava
[ lä′və ]
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.