irruptive

[ih-ruhp-tiv]
adjective
1.
of, pertaining to, or characterized by irruption.
2.
irrupting or tending to irrupt.
3.
Petrology, intrusive.

Origin:
1585–95; irrupt + -ive

irruptively, adverb
unirruptive, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
irruptive (ɪˈrʌptɪv)
 
adj
1.  irrupting or tending to irrupt
2.  of, involving, or causing irruption
3.  obsolete (of igneous rocks) intrusive
 
irruptively
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Species which exhibit irruptive growth are characterized by sharp peaks in population followed by sharp declines.
When food gets scarce, irruptive migration may occur.
There are theories that irruptive bird migrants are mostly food specialists and move based on food supply.
They are irruptive in that they will flock to areas with high rodent populations.
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