ir·rup·tive

[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

ir·rup·tive·ly, adverb
un·ir·rup·tive, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
irruptive (ɪˈrʌptɪv) [Click for IPA pronunciation guide]
 
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
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Irruptive is always a great word to know.
So is ort. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a scrap or morsel of food left at a meal.
Example sentences
They are irruptive in that they will flock to areas with high rodent populations.
Species which exhibit irruptive growth are characterized by sharp peaks in population followed by sharp declines.
There are theories that irruptive bird migrants are mostly food specialists and move based on food supply.
When food gets scarce, irruptive migration may occur.
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