Magma

n. molten rock beneath the earth's crust from which igneous rocks are formed (Geology)

Magma (Plurals: magmas and magmata) is molten rock located beneath the surface of the Earth (or any other terrestrial planet) that often collects in a magma chamber. Magma may contain suspended crystals and gas bubbles. By definition, all igneous rock are formed from magma. Magma is a complex high-temperature fluid substance. Temperatures of most magmas are in the range 700°C to 1300°C, but very rare carbonatite melts may be as cool as 600°C, and komatiite melts may have been as hot at 1600°C. Most are silicate solutions. It is capable of intrusion into adjacent rocks or of extrusion onto the surface as lava or ejected explosively as tephra to form pyroclastic rock.
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Magma is a high-performance computer algebra system designed to solve problems in algebra, number theory, geometry and combinatorics. It is named after the algebraic structure  magma. It runs mainly on the Unix-like and Linux based operating systems, but also supports Windows.
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Noun
1. molten rock in the earth's crust
(hypernym) rock, stone

n. magma, rocky metallic substance found under Earth's crust (Geology)

n. magma (Geology); jumble (Figurative)