Meaning & use
igneous rock
Rock formed by the cooling and hardening of molten magma or lava.
See it in a sentence
Granite is an igneous rock that forms slowly beneath the Earth's surface.
The volcanic island is made almost entirely of igneous rock from past eruptions.
A note on using this word
Igneous rock is one of three main rock types in geology, alongside sedimentary and metamorphic rock.
Words with a similar meaning
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