magmas

Noun

magma (countable and uncountable, plural magmas or magmata)

1. A mixture of molten silicate rock, crystals, and gas within the earth, which may be erupted as lava or cool in place to form igneous intrusions.
   • 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 the chamber of liquid rock – or magma – beneath the volcano.2004, Richard Fortey, The Earth, Folio Society, published 2011, page 10
2. A basic algebraic structure consisting of a set equipped with a single binary operation.
3. Any soft doughy mass.
4. The residuum after expressing the juice from fruits.