Other forms: magmas
Magma is molten rock still under the surface. A magma chamber, rising magma, magma cools slowly.
The same material is called lava once it reaches the air, so the name changes at the surface and nothing else does. How thick it is decides everything about the volcano above it, and magma cooling slowly underground grows large crystals such as granite.
1nounmagmaMolten rock still under the surface.
“Magma rose from deep underground and began to push up the side of the volcano.”
magma is molten rock.
Greek magma means a thick paste or ointment, from massein, to knead.
Ancient Greek
μάγμα
English, today
magma
From Ancient Greek μάγμα. From Ancient Greek μάγμα (“paste”).
Etymology from Wiktionary, CC BY-SA