[mag-muh] /ˈmæg mə/

noun, plural magmas, magmata
[mag-muh-tuh] /ˈmæg mə tə/ (Show IPA)
Geology. molten material beneath or within the earth’s crust, from which igneous rock is formed.
any crude mixture of finely divided mineral or organic matter.
Chemistry, Pharmacology. a paste composed of solid and liquid matter.
noun (pl) -mas, -mata (-mətə)
a paste or suspension consisting of a finely divided solid dispersed in a liquid
hot molten rock, usually formed in the earth’s upper mantle, some of which finds its way into the crust and onto the earth’s surface, where it solidifies to form igneous rock

mid-15c., “dregs,” from Latin magma “dregs of an ointment,” from Greek magma “thick unguent, ointment,” from root of massein “to knead, mold,” from PIE *mag- “to knead” (see macerate). Geological meaning “molten rock” is 1859. Related: Magmalic.

magma mag·ma (māg’mə)

Plural magmata (māg-mä’tə) or magmas
The molten rock material that originates under the Earth’s crust and forms igneous rock when it has cooled. When magma cools and solidifies beneath the Earth’s surface, it forms what are known as intrusive rocks. When it reaches the Earth’s surface, it flows out as lava and forms extrusive (or volcanic) rocks.

Molten rock usually located deep within the mantle of the Earth that occasionally comes to the surface through cracks in the mantle or through the eruption of volcanoes.

Note: When magma cools and solidifies, it forms igneous rock, of which lava is one type.

symbolic mathematics, tool
A program used for heavy duty algebraic computation in many branches of mathematics. Magma, developed by John Cannon and associates at the University of Sydney, succeeded Cayley. It runs at several hundred sites.
E-mail: .
[W. Bosma, J. Cannon and C. Playoust, The Magma algebra system I: The user language, J. Symb. Comp., 24, 3/4, 1997, 235-265].


Read Also:

  • Magma2

    language A language that allows programmability of the control environment, e.g. recursion, backtracking, coroutines, nondeterminism, etc. Magma2 was the successor to MagmaLISP. [“Magma2: A Language Oriented Toward Experiments in Control”, Franco Turini, ACM TOPLAS 6(4):468-486 (Oct 1984)]. (1995-07-30)

  • Magma chamber

    noun 1. a reservoir of magma in the earth’s crust where the magma may reside temporarily on its way from the upper mantle to the earth’s surface noun an underground cavity containing molten rock, esp. below a volcano; also called magma reservoir

  • Magmalisp

    language The predecessor of Magma2. [“MagmaLISP: A Machine Language for Artificial Intelligence”, C. Mantagero et al, Proc 4th Intl Joint Conf Artif Intell, 1975, pp. 556-561]. (1995-07-30)

  • Magma reservoir

    noun See magma chamber

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