magma

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The magma is at temperatures between 1100 to 1250° C when it reaches the Earth's surface as lava at a volcano or mid ocean ridge, yet it cools quickly, in a few days or a couple weeks, forming basalt.

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Definitions (14)

Toggle American Heritage definitions American Heritage Dictionary (4)

  1. noun A mixture of finely divided solids with enough liquid to produce a pasty mass.
  2. noun Geology The molten rock material under the earth's crust, from which igneous rock is formed by cooling.
  3. noun Pharmacology A suspension of particles in a liquid, such as milk of magnesia.
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Examples (50)

  • I think the magma is flowing up on them Hearing and obedience Kansas was a hole walled with stairsteps of cooled lava, terraced for kilometers down to the pit of hell. —  EBSCOhost
  • The increasing sulfur-to-chlorine ratio means the magma is rising. —  The Chronicles Of Pern: First Fall
  • "There is this huge reservoir of magma just three or four miles beneath the surface of the park, and it is that magma -- this is still an active volcano -- that creates the geysers, the mudpots, the hot springs, all the other features for which Yellowstone is famous," he said. —  CBS 2 - KCAL 9 - Los Angeles - Southern California - LA Breaking News, Weather, Traffic, Sports
  • The gases can indicate the existence of shallow magma -- molten rock -- moving up in the volcano, and preliminary analysis indicates these gas emissions are up somewhat, Cervelli said. —  Anchorage Daily News - Alaska News
  • I ran towards the group and turned back just in time to see the ground underneath the Malboro turn into a pool of molten magma, and then shoot up in a column, melting the Malboro with no effort.
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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Middle English, sediment, dregs, from Latin, from Greek, unguent, from massein, mag-, to knead; see mag- in Indo-European roots.

Toggle Century etymologies Century Dictionary (1)

  1. New Latin, from Gr.μάγμα, a kneaded mass, a salve, from μάσσ, σ1ειν (✓ μαγ), knead: see mass. Cf. magdaleon.
 

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/ˈmægmə/
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