dispersion ( def 1 ).

1815–25; disperse + -al2

nondispersal, noun
redispersal, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To dispersal
World English Dictionary
dispersal (dɪˈspɜːsəl)
1.  the act of dispersing or the condition of being dispersed
2.  the spread of animals, plants, or seeds to new areas

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

1821, from disperse + -al (2).
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Example sentences
Dispersal: some movement to lower elevation in northern part of range.
Researchers had thought this species might be a fluke-a single, short-lived
  dispersal of one type of tetrapod.
Dispersal: this species is not migratory, but some individuals can disperse
  long distances.
Dispersal: generally resident, but large irruptions casually occur in fall and
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature