Any crude mixture of mineral or organic matters in the state of a thin paste.
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.
The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc.
The amorphous or homogenous matrix or ground mass, as distinguished from well-defined crystals; as, the magma of porphyry.
The melted rock ejected by a volcano from its top or fissured sides. It flows out in streams sometimes miles in length. It also issues from fissures in the earth’s surface, and forms beds covering many square miles, as in the Northwestern United States.