volcanologyPronunciation: /ˌvɒlkəˈnɒlədʒi/ (also vulcanology)Definition of volcanology noun [mass noun] the scientific study of volcanoes. Derivatives volcanologicalPronunciation: /-nəˈlɒdʒɪk(ə)l/ adjective volcanologist noun volcanology in other Oxford dictionaries Definition of volcanology in the US English dictionary