American Heritage® Dictionary of the English Language, Fourth Edition
- n. A mixture of finely divided solids with enough liquid to produce a pasty mass.
- n. Geology The molten rock material under the earth's crust, from which igneous rock is formed by cooling.
- n. Pharmacology A suspension of particles in a liquid, such as milk of magnesia.
- n. The residue of fruits after the juice has been expressed; pomace.
Century Dictionary and Cyclopedia
- n. Any crude mixture, especially of organic matters, in the form of thin paste.
- n. In medicine
- n. The thick residuum obtained after subjecting certain substances to pressure to extract the fluid parts.
- n. The grounds which remain after treating a substance with water, alcohol, or any other menstruum.
- n. A salve of a certain degree of consistence.
- n. A confection.
- n. In petrol., the ground-mass or basis of a rock; that part which is amorphous or which has no decidedly individualized contours, so far as can be made out from examination of thin sections with the aid of a microscope. It is in such an amorphous homogeneous magma or ground-mass that the crystalline elements of many rocks are embedded. The term magma is also frequently used to designate molten or plastic material lying beneath the surface, which it is desirable to speak of, without any specific indication of its mineral character, in discussing the phenomena of volcanism, metamorphism, etc.
- n. geology The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc.
- n. mathematics A basic algebraic structure consisting of a set equipped with a single binary operation.
GNU Webster's 1913
- n. Any crude mixture of mineral or organic matters in the state of a thin paste.
- n. A thick residuum obtained from certain substances after the fluid parts are expressed from them; the grounds which remain after treating a substance with any menstruum, as water or alcohol.
- n. A salve or confection of thick consistency.
- n. The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc.
- n. The glassy base of an eruptive rock.
- n. (Chem.) The amorphous or homogenous matrix or ground mass, as distinguished from well-defined crystals.
- n. molten rock in the earth's crust
- From Ancient Greek μάγμα ("paste"). (Wiktionary)
- Middle English, sediment, dregs, from Latin, from Greek, unguent, from massein, mag-, to knead; see mag- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“There were countless miles of lava tunnels there, left by retreating magma from a time when the Moon was a burning young rock.”
“Pockets of hot molten rock called magma collect beneath the surface of the Earth.”
“And then this tremor that everybody's talking about, it lasted for about 50 minutes, meaning that the lava or the magma, which is lava that's below the surface, is actually making its way up towards the surface.”
“Now scientist first thought magma, which is lava that hasn't yet made it to the ground wasn't moving to the surface.”
“The resultant body of molten liquid, called magma, will solidify to produce the igneous rock, granite, but if it is still in liquid form as it approaches the surface, lava results.”
“They form when molten rock called magma up and breaks through a weak area”
“Instead, it will collect into huge underground reservoirs known as magma chambers.”
“The mystery lies in the origin of the magma, which is molten rock that forms within the Earth.”
“Like all volcanos, the eruption started when boiling hot subterranean liquid rock, known as magma, found a weak spot in the Earth's crust and burst through.”
“As the plates move, rock partially melts and forms magma, which is forced to the surface through a weak spot in the crust.”
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