• WordNet 3.6
    • n watermark a distinguishing mark impressed on paper during manufacture; visible when paper is held up to the light
    • n watermark a line marking the level reached by a body of water
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Webster's Revised Unabridged Dictionary
    • Watermark A letter, device, or the like, wrought into paper during the process of manufacture.
    • Watermark A mark indicating the height to which water has risen, or at which it has stood; the usual limit of high or low water.
    • Watermark (Naut) See Water line, 2.
    • ***
Century Dictionary and Cyclopedia
    • n watermark The mark, line, or limit of the rise or height of water, as in a well, a river, the sea, etc.; a water-line; especially, a tide-mark.
    • n watermark A faintly marked letter, figure, or design in the fabric of paper, that denotes its size or its manufacturer, usually barely noticeable except when the sheet is held against strong light. It is made in the process of manufacture by the pressure of wires on the moist pulp. The water-marks used by the earlier paper-makers have given names to several of the present standard sizes of paper, as pot, foolscap, crown, elephant, and post, the last being so called from the dcvice of a postman's horn as water-mark.
    • watermark To mark or stamp with water-lines: as, to water-mark paper; a.water-marked page.
    • watermark To mark, inscribe, or embody in water-lines.
    • ***
Chambers's Twentieth Century Dictionary
    • Watermark a mark showing the height to which water has risen: a tide-mark: a mark wrought into paper, denoting its size or its manufacturer
    • ***


Chambers's Twentieth Century Dictionary
A.S. wæter; Dut. water, Ger. wasser; Gr. hydōr, L. udus, wet, unda, a wave, Sans. udan, water.


In literature:

The spots were very faint, however, like the watermarks on paper.
"The Black Phantom" by Leo Edward Miller
The first thing is to examine the paper and envelope, noting its quality, watermark, size, and any feature that may afford a clue.
"The Detection of Forgery" by Douglas Blackburn
A white silk handkerchief, with a watermark, was chosen instead.
"The Manxman A Novel - 1895" by Hall Caine
Inverted watermarks of this Crown and C.C.
"Gambia" by Frederick John Melville
Upon hands and knees I crawled up above watermark and then rose to my feet to look about, recover my breath, and get my bearings.
"Under the Ensign of the Rising Sun" by Harry Collingwood
They held the envelope up to the light in order to discover a watermark.
"The Island Mystery" by George A. Birmingham
But hold the paper up before the sun: You'll see "Napoleon" in the watermark!
"L'Aiglon" by Edmond Rostand
The watermark of this is an Apple, with the initials W. M., as in the other two watermarks.
"The Art and Craft of Printing" by William Morris
In a short time, over the smooth surface of the wall, the watermark shows itself.
"Black Diamonds" by Mór Jókai
The watermarks of the paper also differ.
"On the magnet, magnetick bodies also, and on the great magnet the earth" by William Gilbert of Colchester

In news:

Watermark Designs Forms Alliance With Devon & Devon.
Achieves Accreditation to Issue Australian WaterMark .
Part of NSF Passport Program, manufacturers can now obtain certification for WaterMark .
Cheap Eats Summer Special at Watermark .
Events Last Chance for Discount Tickets to Iron Fork — And New Watermark Chef Enters the Ring.
Residents at East Village Place attend a current events class, part of the assisted living community's Watermark University program.
So stop calling it the Watermark .
The gingerbread saddle is on display at the Omni Watermark .
WaterMark 's first phase, in 2005, was 53 urban-loft condominiums of which 30 percent have been sold.
Chefs' Secrets: Watermark Grill's Roasted Garlic Shrimp.
Police say the counterfeit 100's Dana Leland used to try to buy items at a Target store had watermarks showing Honest Abe.
Philip Stein, 85, of Northeast Philadelphia, a supermarket owner and educator , died Saturday, Nov 17, at the Watermark, a retirement residence in Center City.
Security features include Magicard's patented HoloKote which adds a watermark to the card during the normal print cycle, enabling extra security at no extra cost.
Watermark Place/One Grand Rapids Place.
We tend to think of Supreme Court decisions as watermarks showing the state of the culture.

In science:

So, the transformation r−θ ◦ rθ is applied to the watermarked image.
Improving random number generators by chaotic iterations. Application in data hiding
This is a good result if we take into account the fact that we use spatial embedding. 4) Gaussian noise.: A watermarked image can be also attacked by the addition of a Gaussian noise, depending on a standard deviation.
Improving random number generators by chaotic iterations. Application in data hiding
Guan. A novel digital watermark algorithm based on chaotic maps.
Improving random number generators by chaotic iterations. Application in data hiding
In this section, an application example is given in the field of digital watermarking: a watermark is encrypted and embedded into a cover image using the scheme presented in and CI(XORshift, XORshift).
Randomness Quality of CI Chaotic Generators: Applications to Internet Security
Thus, the encrypted watermark is the last boolean vector generated by these chaotic iterations.
Randomness Quality of CI Chaotic Generators: Applications to Internet Security