All articles starting with W
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Waterman Pen Company
The Waterman Pen Company, or L. E. Waterman Company, is a fountain pen maker founded by Lewis Edson Waterman in New York in 1884, now made in France.
Watermark
A watermark is a design embedded in paper during manufacture, visible when the sheet is held up to light; the first was made in Fabriano, Italy, in 1282.
Watermarking evasion attacks
Watermarking evasion attacks are techniques that destroy or forge the statistical watermark embedded in AI-generated text, with paraphrasing by a second model as the canonical attack.
Watermarking of generated text
Watermarking of generated text embeds a statistically detectable signal in LLM output as the text is produced, so it can later be identified as machine-generated without noticeably changing what it says.
Watermelon
Watermelon (Citrullus lanatus), African Cucurbitaceae vine grown for its large sweet fruit over 90% water; seedless triploid types need diploid pollenizers; China leads 2024 production.
Watermelon mosaic virus
Watermelon mosaic virus (WMV, Potyvirus citrulli, formerly WMV-2) is a potyvirus with ~760 nm flexuous particles causing mosaic disease in cucurbits, transmitted non-persistently by 35+ aphid species, not seed-borne, managed by reflective mulches and resistant squash.
Watermelon Pictures
Watermelon Pictures is a Chicago-based American film production and distribution company founded in April 2024 by Palestinian-American brothers Hamza and Badie Ali, a unit of MPI Media Group, releasing Palestinian and marginalized-community films and running the Watermelon+ streaming service.
Watermelon stereotype
The watermelon stereotype is a post-emancipation American racist trope falsely linking African Americans to excessive watermelon eating, built to ridicule Black freedom, spread through prints, ads, and films, and historically distinct from the watermelon as a Palestinian solidarity symbol.
Watermelon Sugar
"Watermelon Sugar" is a song by English singer Harry Styles from his 2019 album Fine Line, re-released as a single in 2020 and winner of the 2021 Grammy for Best Pop Solo Performance.
Watermill
A watermill is a structure that uses a water wheel or turbine to convert flowing or falling water into power for machinery, most classically grinding grain.
Waterpark Simulator
Waterpark Simulator is a first-person waterpark management simulation by CayPlay, in Steam Early Access from 22 August 2025 and released 31 July 2026 on PC, PS5, and Xbox Series X|S, with co-op, ragdoll physics, and 96% positive Steam reviews; distinct from Waterpark Simulator 2025 by Aldi Pratama.
Waterparks (band)
Waterparks (Parx) is an American pop-rock trio from Houston, Texas, formed in 2011: Awsten Knight, Geoff Wigington, Otto Wood. Six albums from Double Dare (2016) to JINX (2026), genre-hopping pop-punk with charting Billboard albums.
Waterproofing
Waterproofing is the set of materials and construction methods used to prevent liquid water from penetrating foundations, basements, roofs, decks, and tunnels, and is distinct from dampproofing.
Waters between Lolland and Falster including Rødsand, Guldborg sound, and Bøtø Nor
Ramsar site no. 164 (Danish R25), Farvandet mellem Lolland og Falster med Rødsand, Guldborgsund og Bøtø Nor: 34,812 ha of shallow Danish coastal waters designated 1977, important for waterbirds, Mute Swan moulting, and seals.
Waters Corporation
Waters Corporation, formerly Waters Associates, is an American analytical-instrument maker founded by James Waters in Massachusetts in 1958, best known as the leading maker of liquid chromatography systems.
Waters South of Zealand, Skælskør Fjord, Glænø and adjacent wetlands
Ramsar Site no. 158 (Danish no. 19, R19), a 1977-designated coastal wetland in Sjælland, Denmark, covering Skælskør Fjord, Glænø, lagoons, and marshes within Natura 2000 site 162.
Waters southeast of Fejø and Femø islands
Ramsar site no. 160 (Danish no. 21, Farvandet sydøst for Fejø og Femø), a 41,826 ha shallow coastal wetland in Smålandsfarvandet, Denmark, designated 1977, important for Mute Swan, Whooper Swan, and Little Tern, part of Natura 2000.
WaterSense
WaterSense is a voluntary United States Environmental Protection Agency partnership program, launched in 2006, that labels water-efficient products and homes using at least 20 percent less water.
Watershed (broadcasting)
The watershed in broadcasting is the UK's 9 pm (2100) television boundary, enforced by Ofcom's Broadcasting Code, before which content unsuitable for children such as strong language, violence and sexual material is restricted; extended equivalents exist in Canada and other countries, while on-demand services are now regulated separately under the Media Act 2024.
Watershed algorithm
The watershed algorithm is an image-segmentation method from mathematical morphology that treats pixel intensities as terrain elevation, flooding catchment basins from seed points to separate touching objects.
Watershed management
Watershed management organizes land, water, and resource use within a drainage basin, evolving into integrated, participatory, adaptive management using remote sensing, GIS, and modeling; effects include runoff cuts up to 25% and recharge gains of 40–70%.
Watershed segmentation
Watershed segmentation is an image segmentation method from mathematical morphology that treats pixel intensities as landscape elevation, flooding from minima or markers to separate regions and touching objects.
Watershed stroke
Watershed stroke, also called border zone infarct, is an ischemic stroke at the junction of cerebral arterial territories (ACA/MCA/PCA). About 10% of brain infarcts; caused by hypoperfusion and embolism, often with carotid stenosis.
Watership Down
Watership Down, Richard Adams's 1972 novel of rabbits fleeing their destroyed warren for a Hampshire hill, won the Carnegie Medal and Guardian Award, sold over 50 million copies, and inspired the 1978 Martin Rosen film, 1999 TV series, and 2018 BBC/Netflix miniseries.
Watership Down (film)
Watership Down (1978 film), Martin Rosen's British animated adaptation of Richard Adams' 1972 novel; 92 minutes, John Hurt as Hazel, "Bright Eyes" a 1979 UK No. 1, BFI 4K restoration released 2024.
Waterski & wakeboard
Waterski & wakeboard: towed surface water sports pulled by boat or cable, governed by the IWWF (founded 1946, Geneva). Covers slalom, tricks, jump, boat vs cable wakeboard, speeds, equipment, and World Games presence.
Waterskiing and wakeboarding
Waterskiing and wakeboarding are boat- or cable-towed water sports governed by the IWWF (founded 1946). Waterskiing uses forward-facing skis at 30–32 mph; wakeboarding uses a sideways stance on a binding board at 18–24 mph with ballast-enhanced wakes.
Waterspout
A waterspout is a whirling column of air and water mist over a body of water, coming in two types: tornadic waterspouts and more common fair weather waterspouts.
Waterstones
Waterstones is Britain's largest dedicated high-street bookseller, founded by Tim Waterstone in 1982 and now owned by Elliott. Under CEO James Daunt it turned around after 2011, reached 317 shops, and also owns Foyles, Hatchards, and Blackwell's.
Watertight subdivision
Watertight subdivision is the division of a ship's hull into compartments separated by watertight bulkheads and decks, so that flooding after hull damage is confined and the ship stays afloat.