volcanic

1. not comparableOf or pertaining to a volcano or volcanoes.

   volcanic heat

   2 more examples

   volcanic activity

   Some 200 million years ago, the rocks that became the Palisades cliffs just across the Hudson River from Manhattan formed during volcanic activity that helped rip apart the ancient supercontinent Pangea. That volcanism helped lead to the birth of the Atlantic Ocean while it also contributed to killing off as much as a quarter of all life on Earth during the event known as the end-Triassic mass extinction.

   2022 February 3, Lucas Joel, “Dissolving in Toxic Oceans: How an Ancient Extinction Happened”, in The New York Times, →ISSN, archived from the original on 16 Mar 2022

2. not comparableProduced by a volcano, or, more generally, by igneous agencies.

   volcanic ash

   1 more example

   volcanic tufa

3. not comparableChanged or affected by the heat of a volcano.
4. figurativelynot comparableReminiscent of a volcano; explosive, violent, full of suppressed anger, energy etc.

   Jo rose indignified, Vanessa following in her volcanic wake.

   1980 August 2, Andrea F. Loewenstein, “Random Lust”, in Gay Community News, page 15

   2 more examples

   With that the system was complete, and ready to have its disastrous effect on Martin Luther's volcanic temper.

   2009, Diarmaid MacCulloch, A History of Christianity, Penguin, published 2010, page 556

   [Dan Bongino] was in a volcanic mood. As soon as he entered the room, he erupted at Bondi, shouting at her.

   2026 June 10, Maggie Haberman, Jonathan Swan, “Inside Trump’s White House, the Epstein Files Caused a Freakout”, in The New York Times Magazine, New York, N.Y.: The New York Times Company, →ISSN, →OCLC

plural volcanics

1. A volcanic rock.

   The Ellesmere Island Volcanics are a Late Cretaceous volcanic group of volcanoes and lava flows in the Qikiqtaaluk Region of northern Ellesmere Island, Nunavut, Canada.