Sign on Paper Money Only Visible Under Light

This page is the CodyCross answer for the clue below from New York, New York!, Group 376, Puzzle 5 (Madame Tussauds).

Question is: Sign on Paper Money Only Visible Under Light

and the answer is: WATERMARK

Word Meaning:

WATERMARK — A translucent design impressed on the surface of paper and visible when the paper is held to the light.

Definitions from Wiktionary.

Sign on paper money only visible under light — CodyCross Answer | CodyCross Solutions