Dictionary Meaning and Definition on 'Pahoehoe'
n : freely flowing lava
- Pahoehoe \Pa*ho"e*ho`e\, n. (Min.)
A name given in the Sandwich Islands to lava having a
relatively smooth surface, in distinction from the
rough-surfaced lava, called a-a.
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Wikipedia Meaning and Definition on 'Pahoehoe'
Lava is a type of molten rock expelled by a volcano during an eruption. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at temperatures from 700 °C to 1,200 °C (1,300 °F to 2,200 °F). Up to 100,000 times as viscous as water, lava can flow great distances before cooling and solidifying because of its thixotropic and shear thinning properties.
A lava flow is a moving outpouring of lava, which is created during a non-explosive effusive eruption. When it has stopped moving, lava solidifies to form igneous rock. The term lava flow is commonly shortened to lava. Explosive eruptions produce a mixture of volcanic ash and other fragments called tephra, rather than lava flows. The word "lava" comes from Italian, and is probably derived from the Latin word labes which means a fall or slide. Serao described "a flow of fiery lava" as an analogy to the flow of water and mud down the flanks of the volcano following heavy rain.[See more about Pahoehoe at Dictionary 3.0 Encyclopedia]