Examples Word Origin See more synonyms on Thesaurus.com noun, plural mag·mas, mag·ma·ta . [ mag-m uh-t uh] /ˈmæg mə tə/ . 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. Origin of magma 1400–50; late Middle English
dregs, leavings <
kneaded mass, salve, equivalent to
to knead, press; see
noun suffix of result
Related forms mag·mat·ic , [mag- mat-ik] /mægˈmæt ɪk/ adjective mag·ma·tism, noun Can be confused lava magma
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for magmatic Historical Examples It may be noted also that hypersthene shows a tendency to magmatic alteration, although only rarely. British Dictionary definitions for magmatic noun plural -mas or -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 Derived Forms magmatic ( mæɡˈmætɪk), adjective magmatism, noun Word Origin
C15, from Latin: dregs (of an ointment), from Greek: salve made by kneading, from
massein to knead
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for magmatic magma n.
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.
Online Etymology Dictionary, © 2010 Douglas Harper
magma (măg ′mə) A mixture of finely divided solids with enough liquid to produce a pasty mass. A suspension of particles in a liquid, such as milk of magnesia.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Plural magmata ( măg-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.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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
, of which
is one type.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.