name, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Alternative spelling of Vulcanism (“historical scientific view”). alt-of, alternative
2. 2
   Alternative spelling of volcanism (“volcanic activity”). alt-of, alternative

Proper Noun

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

Synonyms

All synonyms

plutonismplutonism

Etymology

From Vulcan + -ism.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.