Supervolcano Definition
    noun
  
 (volcanology, neologism) A powerful volcano, often having an explosive or cataclysmic eruption.
Wiktionary 
Other Word Forms of Supervolcano
Noun
Singular:
 supervolcanoPlural:
 supervolcanoes, supervolcanosOrigin of Supervolcano
-  
super- + volcano, coined in a 2000 documentary about the Yellowstone Caldera.
From Wiktionary
 
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