Vulcanism

See also: vulcanism

English

Alternative forms

• volcanism
• vulcanism

Etymology

From Vulcan +‎ -ism.

Proper noun

Vulcanism

1. (historical) The belief, held mostly in the 18th century, that rocks were formed in fire. It was a rival theory to Neptunism.

Synonyms

• Plutonism

Related terms

• Vulcanist