- 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.
Origin of volcano
Examples from the Web for volcano
Standing on the edge of the Burfell volcano, you realize what a fragile construct modern civilization is.Want to Write a Book? Go to Iceland
May 26, 2014
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
May 18, 2014
When the volcano blew its top, thousands perished, immolated by fire, boiling magma, and ash.The Volcano That Rewrote History
May 5, 2014
Did they ever watch a YouTube video of what a volcano actually looks like?True Detective Director Cary Fukunaga’s Journey from Pro Snowboarder to Hollywood’s Most Wanted
February 26, 2014
Hard to see how you'd get a volcano to spit boulders just where you needed them to fall...War Declared Between Rocks and Trees
November 7, 2013
Had some thief stolen them and hidden here, only to be caught by the volcano?Buried Cities: Pompeii, Olympia, Mycenae
A shower of red-hot stones warned him that he was near the volcano.Classic Myths
Mary Catherine Judd
The witness started as though a volcano had burst at her feet.The First Violin
As before, the valley yawned like the living threat of a volcano in eruption.The Hammer of Thor
Charles Willard Diffin
The volcano's top had been stripped clean by the winds of countless years.Two Thousand Miles Below
Charles Willard Diffin
- 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
Word Origin and History for volcano
1610s, from Italian vulcano "burning mountain," from Latin Vulcanus "Vulcan," Roman god of fire, also "fire, flames, volcano" (see Vulcan). The name was first applied to Mt. Etna by the Romans, who believed it was the forge of Vulcan.
- 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.
A cone-shaped mountain or hill created by molten material that rises from the interior of the Earth to the surface.