alien

Science Dictionary
alien  [%PREMIUM_LINK%]     (ā'lē-ən)  Pronunciation Key 
Introduced to a region deliberately or accidentally by humans. Starlings, German cockroaches, and dandelions are species that are alien to North America but have become widely naturalized in the continent. Compare endemic, indigenous.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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