Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Volcanic force or activity.
  • n. The phenomena associated with volcanic activity.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of the natural phenomena and processes associated with the action of volcanos, geysers and fumaroles

from the GNU version of the Collaborative International Dictionary of English

  • n. Volcanic power or action; volcanicity.

from The Century Dictionary and Cyclopedia

  • n. The phenomena connected with volcanoes and volcanic activity.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the phenomena associated with volcanic activity

Etymologies

volcano + -ism (Wiktionary)

Examples

  • As Italy is one of the most recently developed parts of the mainland and of the crust that has risen above the waters, it is subject to the phenomena that are due to that internal energy of the earth called volcanism, which is manifested in the various forms of volcanic activity, in earthquakes and in microseisms.

    The Catholic Encyclopedia, Volume 8: Infamy-Lapparent

  • ET, the distribution of heatflow on earth is in the first place determined by the distribution of oceanic basaltic volcanism, which is in it’s turn determined by mid-oceanic ridges, which position is driven by viscous sic flow in the upper mantle.

    Hits « Climate Audit

  • Formed the idea of uniformitarianism stating current geologic processes, such as volcanism and erosion, have been at work throughout Earth's history.

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  • How about "volcanism" on a body just 6 km in diameter?

    Signs of the Times

  • ** With the dating of rock by means of radioactive substances, it is not a question of how long the material has been present in the earth, but when it was formed by volcanism or by sedimentation depositing by water.

    Modern Science in the Bible

  • Researchers had speculated that volcanism contributed to this, and now there is evidence to accompany the theory.

    Coal Fires May Have Caused Biggest Mass Extinction Ever

  • The contribution to the present day atmospheric CO2 loading from volcanic emissions is, however, relatively insignificant, and it has been estimated that subaerial volcanism releases around 300 Mt/yr CO2.

    What's the carbon footprint of ... a volcano?

  • Smithsonian researchers are keen to participate, not only to expose children to science but also to serve as role models, says Elizabeth Cottrell, a geologist and director of the Smithsonian's global volcanism program.

    Interactive game 'Vanished' doubles as an educational tool

  • An ELE, thanks to global thermonuclear war (or, hell, even regional thermonuclear), major impactor, resumed volcanism leading to flood basalts, sea level fluctuations, Jesus, or a combination of any or all.

    Matthew Yglesias » David Petraeus, Jew-Hater

  • Seismically induced phenomena, volcanism, and landslides (triggered by torrential rains or earthquakes) are the major natural disturbances influencing the montane forest units within the Talamancan Range.

    Talamancan montane forests

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