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Adjective eruptive has 3 senses
eruptive, volcanic - igneous rock produced by eruption and solidified on or near the earth's surface; rhyolite or andesite or basalt; "volcanic rock includes the volcanic glass obsidian"Antonym:  intrusive (indirect, via extrusive)
 
irruptive, eruptive, plutonic - of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbroAntonym:  extrusive (indirect, via intrusive)
 
eruptive - erupting or tending to erupt; "a geyser is an intermittently eruptive hot spring"Antonyms:  dormant, inactive (indirect, via extinct, active)
 Antonyms:  extinct, inactive (indirect, via active, dormant)
 
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