volcanism

[ vol-kuh-niz-uh m ]
/ ˈvɒl kəˌnɪz əm /

noun Geology.

the phenomena connected with volcanoes and volcanic activity.
Also vulcanism.

Origin of volcanism

First recorded in 1865–70; volcan(o) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for volcanism

  • Volcanoes and volcanism are not restricted to the planet Earth.

    Volcanoes|Robert I. Tilling

British Dictionary definitions for volcanism

volcanism

vulcanism

/ (ˈvɒlkəˌnɪzəm) /

noun

those processes collectively that result in the formation of volcanoes and their products
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