vulcanology(n = noun.cognition) volcanology - the branch of geology that studies volcanoes;
is a kind of geophysical science, geophysics
The science which treats of phenomena due to plutonic action, as in volcanoes, hot springs, etc. [1913 Webster]
vulcanology, n. (also volcanology) the scientific study of volcanoes.
Derivative:
vulcanological adj. vulcanologist n.