- 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.
- a paste composed of solid and liquid matter.
- 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
