"eruptive" in the adjective sense
1. eruptive
producing or characterized by eruptions
"an eruptive disease"
2. igneous, eruptive
produced by the action of fire or intense heat
"rocks formed by igneous agents"
3. eruptive
actively spewing out lava
"a geyser is an intermittently eruptive hot spring"
Source: WordNet® (An amazing lexical database of English)
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