adj.
Pronunciation: ˌ väl-k ə -n ə - ' lä-ji-k ə l, ˌ vo ̇ l-
Variant: also vol · ca · no · log · ic \ -jik \
Function: adjective
Date: circa 1891
: of, relating to, or involving volcanology or volcanic phenomena < volcanological processes that shape the planets>