Definition of "vulcanism" []

• Variant of volcanism. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I meant to use the word vulcanism, which can mean any volcanic or geo-thermal process could be geyser related also."
• "Already I wonder if this unique planetoid may not have had, in the past, a kind of vulcanism special to itself."
• "[3] Transcriber's note: The original read 'vulcanism'."