thread mark
noun
a thin threading in paper currency to make counterfeiting difficult.
Words nearby thread mark
thrawart,
thrawn,
thread,
thread blight,
thread escutcheon,
thread mark,
thread rolling,
thread rope,
thread silk,
thread vein,
thread-legged bug
British Dictionary definitions for thread mark
thread mark
noun
a mark put into paper money to prevent counterfeiting, consisting of a pattern of silk fibres