security thread

noun

1. a colored thread running through the paper of a piece of paper money, used to deter counterfeiting.

Example Sentences

Riddle says the counterfeit bills lacked the portrait watermark and security thread.

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He says while the prop money looks real, it feels heavier than real currency and is also missing the security thread.

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These include a special paper with raised print, a portrait window and security thread, a silver stripe that reveals a portrait of Europa, and an emerald number that reflects light.

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For example, a $20 bill has the color-shifting ink on the denomination in the bottom right-hand corner, a ghost portrait of Jackson on the right side and a security thread with the word twenty written over and over.

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These combine with traditional security features, such as a portrait watermark and an embedded security thread that glows pink under ultraviolet light.

Read more on BBC