1.
magma; molten rock beneath the earth's surface
Extremely hot molten rock found deep beneath the earth's surface, particularly under volcanoes. When it reaches the surface during an eruption, it is called 溶岩 (lava).
A loanword from English (ultimately from Latin/Greek). Refers to molten rock found beneath the earth's surface. When magma erupts and flows on the surface, it is called 溶岩 (lava). An essential term for understanding volcanoes, which are a major part of Japan's geography and natural disaster awareness.