Definition of thread mark in English:

thread mark

Line breaks: thread mark

Entry from British & World English dictionary

noun

A mark in the form of a thin line made in banknote paper with highly coloured silk fibres to prevent photographic counterfeiting.

Definition of thread mark in:

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Word of the day antebellum
Pronunciation: ˌantēˈbeləm
adjective
occurring or existing before a particular war…