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A restraining device having a pair of plastic loops that can be tightened and locked about the wrists or ankles, used especially when taking a prisoner into custody.
[From the zipping sound made by the corrugations on the loops as they are drawn tight.]
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.