Definition of magma in English:

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magma

Pronunciation: /ˈmaɡmə/

noun (plural magmas or magmata /ˈmaɡmətə/)

[mass noun]
Hot fluid or semi-fluid material below or within the earth’s crust from which lava and other igneous rock is formed on cooling: when red-hot magma comes into contact with seawater, an explosion results [count noun]: basaltic magmas are normally expelled at the surface in a very hot and fluid state
More example sentences
  • Massive sulfide deposits may also form in other settings where water circulates in rocks near cooling magma.
  • What they do know is that a ‘slow rise’ of magma is driving lava to the surface, which has created a new lava dome in the mountain's crater.
  • Melts form at the highest temperatures and lowest pressures resulting in large volumes of tholeiitic magma that form shield volcanoes such as Mauna Loa.

Derivatives

magmatic

Pronunciation: /maɡˈmatɪk/
adjective
Example sentences
  • In central and northern Sardinia there is evidence of an Ordovician magmatic belt upon older basement interpreted as an Andean-type volcanic arc.
  • Thin-section analysis shows that the minerals forming the magmatic foliation do not show any signs of deformation or recrystallization.
  • Rifting was associated with magmatic activity.

Origin

Late Middle English (in the sense 'residue of dregs after evaporation or pressing of a semi-liquid substance'): via Latin from Greek magma (from massein 'knead').

For editors and proofreaders

Line breaks: magma

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