Vulcanism
See also:
vulcanism
English
Alternative forms
volcanism
vulcanism
Etymology
From
Vulcan
+
-ism
.
Proper noun
Vulcanism
(
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