Volcano Definition

vŏl-kānō
volcanoes, volcanos
noun
volcanoes, volcanos
A vent in the earth's crust through which molten rock (lava), rock fragments, gases, ashes, etc. are ejected from the earth's interior: a volcano is active while erupting, dormant during a long period of inactivity, or extinct when all activity has finally ceased.
Webster's New World
A similar opening on the surface of another planet.
American Heritage
A cone-shaped hill or mountain, wholly or chiefly of volcanic materials, built up around the vent, usually so as to form a crater.
Webster's New World

A vent or fissure on the surface of a planet (usually in a mountainous form) with a magma chamber attached to the mantle of a planet or moon, periodically erupting forth lava and volcanic gases onto the surface.

Wiktionary
Synonyms:

Other Word Forms of Volcano

Noun

Singular:
volcano
Plural:
volcanoes, volcanos

Origin of Volcano

  • Italian from Spanish volcán or Portuguese volcão both probably from Latin volcānus, vulcānus fire, flames from Volcānus Vulcan

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Italian vulcano, from Latin Vulcanus (“Vulcan") the Roman god of fire and metalworking.

    From Wiktionary

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