a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals.
a mountain or hill, usually having a cuplike crater at the summit, formed around such a vent from the ash and lava expelled through it.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use volcano in a sentence
Cassini’s instruments also detected the presence of silica, which can get mixed with water in undersea volcanoes.These Images Expose the Dark Side of the Solar System - Issue 89: The Dark Side | Corey S. Powell | August 26, 2020 | Nautilus
It also includes active volcanoes such as the Ol Doinyo Lengai in Tanzania, and the DallaFilla and Erta Ale in Ethiopia.Scientists say a new ocean will form in Africa as the continent continues to split into two | Uwagbale Edward-Ekpu | August 13, 2020 | Quartz
The Natural History Museum in London, England offers a guide to making your own model volcano at home.
In one of the most poignant scenes in her book, she is hiking on Mauna Kea — the next volcano over from Greene’s Mars habitat — and finds a fern growing amid the volcanic desolation.Two new books explore Mars — and what it means to be human | Lisa Grossman | July 15, 2020 | Science News
He particularly likes this approach that linked cycles of pressure inside the volcano with weather conditions.Did rain put the Kilauea volcano’s lava-making into overdrive? | Megan Sever | May 15, 2020 | Science News For Students
And as we left, spears of sunlight painted the top of the nearby volcano Galeras.
Standing on the edge of the Burfell volcano, you realize what a fragile construct modern civilization is.
It ends with Godzilla lured away from Tokyo with a bird call and trapped in a volcano.A Comprehensive History of Toho’s Original Kaiju (and Atomic Allegory) Godzilla | Rich Goldstein | May 18, 2014 | THE DAILY BEAST
When the volcano blew its top, thousands perished, immolated by fire, boiling magma, and ash.
This week they got Mike Tyson and Razor Ruddock over at the Mirage, where the fake volcano blows up every twenty minutes.The Stacks: Harold Conrad Was Many Things, But He Was Never, Ever Dull | Mark Jacobson | March 8, 2014 | THE DAILY BEAST
A volcano broke out in the island of St. George, one of the Azores.The Every Day Book of History and Chronology | Joel Munsell
Fujiyama, the noted volcano of Japan, is twelve thousand three hundred and sixty-five feet high.Assimilative Memory | Marcus Dwight Larrowe (AKA Prof. A. Loisette)
And what was a mere laughing, crying child of a man like Aristide Pujol in front of a Ducksmith volcano?The Joyous Adventures of Aristide Pujol | William J. Locke
Torrents of lava poured over the sides of the volcano and destroyed whole villages on the shores of the lake.Alila, Our Little Philippine Cousin | Mary Hazelton Wade
Outwardly cold, Sir Henry seemed to his youthful observer, who now knew him better, to resemble a volcano coated with ice.The Red Year | Louis Tracy
British Dictionary definitions for volcano
an opening in the earth's crust from which molten lava, rock fragments, ashes, dust, and gases are ejected from below the earth's surface
a mountain formed from volcanic material ejected from a vent in a central crater
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for volcano
An opening in the Earth's crust from which lava, ash, and hot gases flow or are ejected during an eruption.
A usually cone-shaped mountain formed by the materials issuing from such an opening. Volcanoes are usually associated with plate boundaries but can also occur within the interior areas of a tectonic plate. Their shape is directly related to the type of magma that flows from them-the more viscous the magma, the steeper the sides of the volcano.♦ A volcano composed of gently sloping sheets of basaltic lava from successive volcanic eruptions is called a shield volcano. The lava flows associated with shield volcanos, such as Mauna Loa, on Hawaii, are very fluid.♦ A volcano composed of steep, alternating layers of lava and pyroclastic materials, including ash, is called a stratovolcano. Stratovolcanos are associated with relatively viscous lava and with explosive eruptions. They are the most common form of large continental volcanos. Mount Vesuvius, Mount Fuji, and Mount St. Helens are stratovolcanos. Also called composite volcano See more at hot spot island arc tectonic boundary volcanic arc.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for volcano
A cone-shaped mountain or hill created by molten material that rises from the interior of the Earth to the surface.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.