The quality or condition of being volcanic, or the degree to which volcanic activity is present.

ज्वालामुखीयता

English Usage: The volcanicity of the region is evident from the numerous geothermal features present.

Hindi Usage: इस क्षेत्र की ज्वालामुखीयता कई भू-तापीय विशेषताओं से स्पष्ट है।