Argentine ant

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Argentine ant

n.
A small brown ant (Linepithema humile) native to South America that is a household and agricultural pest in many parts of the world, including California and the southeast United States.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.