[mahy-gruh-tawr-ee, -tohr-ee]
periodically migrating: a migratory species; migratory workers.
pertaining to a migration: migratory movements of birds.
roving; nomadic; wandering.
Also, migrative.

1745–55; migrate + -ory1

nonmigratory, adjective
premigratory, adjective
unmigrative, adjective
unmigratory, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
migratory (ˈmaɪɡrətərɪ, -trɪ)
1.  of, relating to, or characterized by migration
2.  nomadic; itinerant

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1753, from L. migrat-, pp. stem of migrare (see migration).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
migratory   (mī'grə-tôr'ē)  Pronunciation Key 
Traveling from one place to another at regular times of year, often over long distances. Salmon, whales, and swallows are all migratory animals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Words in whatever language came from words in another, migratory or previous
  and historically overlapping language.
The report suggests forming an elephant-conservation body and legal protection
  for the migratory corridors.
Even today little is known of their reproductive habits or migratory movements.
Migratory tuna are also unlikely candidates for farming.
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