adjective

volcanic

vahl-KAN-ik/vɑːlˈkænɪk/

Relating to volcanoes and their eruptions.

Lava from the crater cools into dark volcanic rock on the slope.

A volcano with a clearly visible summit crater feeding a continuous lava flow that cools into dark rock on its lower slope, making the volcanic origin of the material visible.

Etymology

Vulcan’s name became associated with burning mountains; the Romans regarded Etna as his forge. Volcanic describes what belongs to or is produced by such mountains and their activity.

In context

Unreal Planet Earth124:37

is known for its persistent lava lake at its summit. This makes it one of the few volcanoes in the world to exhibit such continuous volcanic activity

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More examples

Volcanic ash blankets the nearby fields.
Scientists monitor volcanic activity beneath the mountain.
A volcanic eruption formed this island.

Forms

volcanic

volcano noun — An opening that releases lava and gases.

volcanically adverb — In a way involving volcanic activity.

Similar words

igneous: Describes rock formed from molten material, including underground.
eruptive: Emphasizes eruptions rather than everything connected with volcanoes.