Magma

·noun The glassy base of an eruptive rock.

II. Magma ·noun A salve or confection of thick consistency.

III. Magma ·noun Any crude mixture of mineral or organic matters in the state of a thin paste.

IV. Magma ·noun The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, ·etc.

V. Magma ·noun The amorphous or homogenous matrix or ground mass, as distinguished from well-defined crystals; as, the magma of porphyry.

VI. Magma ·noun 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.