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.

From Washington Times

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

From Washington Times

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.

From US News

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.

From Washington Times

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

From BBC