Meanings (ES + gloss)
magma
The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc.
By the pathside, there are occasional large boulders that shown black crystals the size of a fingernail; these are pyroxene minerals that had time to crystallise out deep within th…
magma
A basic algebraic structure consisting of a set equipped with a single binary operation.