Hypertext Webster Gateway: "irruptive"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Irruptive \Ir*rup"tive\, a.
Rushing in or upon.
From WordNet (r) 1.7 (wn)
irruptive
adj : igneous rock that has solidified beneath the earth's
surface; granite or diorite or gabbro [syn: {eruptive},
{plutonic}]
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