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thread mark

American  

noun

  1. a thin threading in paper currency to make counterfeiting difficult.

thread mark British  

noun

  1. a mark put into paper money to prevent counterfeiting, consisting of a pattern of silk fibres

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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On the stock there is a deep mark to correspond with the standard thread mark on the dies.

From Elements of Plumbing by Dibble, Samuel Edward

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.