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Threshold slope
A threshold slope is a hillslope steepened to the limiting angle of stability, where further uplift or river incision is absorbed by landsliding rather than steepening.
Threshold switching
Threshold switching is a volatile electrical phenomenon where a two-terminal device abruptly switches from a highly resistive OFF state to a conductive ON state above a threshold voltage.
Threshold Test Ban Treaty
Threshold Test Ban Treaty (TTBT), 1974 US-Soviet Treaty on the Limitation of Underground Nuclear Weapon Tests; bans underground weapon tests above 150 kilotons; signed 3 July 1974, in force 11 December 1990 with hydrodynamic and seismic verification.
Threshold theorem
The threshold theorem is a result in fault-tolerant quantum computation: quantum circuits of any size are reliable if per-location error rates stay below a fixed threshold.
Threshold value
Threshold value: a dose, exposure, or concentration below which a stated adverse effect is not observed or expected. Covers the ACGIH threshold limit value (TLV-TWA, STEL, ceiling) and EU environmental threshold values for groundwater.
Threshold Ventures
Threshold Ventures is an early-stage venture capital firm in Menlo Park, California, formed in 2019 when DFJ's early-stage team spun out, led by Emily Melton and Josh Stein.
Threshold voltage
Threshold voltage (Vth) is the gate-to-source voltage at which a MOSFET forms a conducting channel and begins to turn on, setting its switching point and off-state leakage.
Thresholding (image processing)
Thresholding is the simplest image-segmentation method, converting a grayscale image to binary by comparing pixel intensities against thresholds; variants include global, local, hysteresis, and Otsu's method.
Threskiornis
Threskiornis is a genus of six large wading ibis species across Africa, Asia, and Australia, established by George Robert Gray in 1842; the sacred ibis was venerated in ancient Egypt.
Thressa C. Stadtman
Thressa C. Stadtman was an American biochemist at the National Institutes of Health who discovered selenocysteine, the 21st amino acid, and worked there from 1950 to 2009.
Thriasion Lager
Thriasion Lager (Thriasian Lager) is an ancient fortified camp in West Attica, Greece, 3 km west of the Dema Wall, with an eight-towered enclosure and a 510 m spur wall, likely an invader's base facing the Dema.
Thrice
Thrice: American rock band formed 1998 in Irvine, California; four-piece of Kensrue, Teranishi, and the Breckenridge brothers; post-hardcore to art rock across 12 albums, including The Alchemy Index and 2025's Horizons/West.
Thrift Savings Plan
The Thrift Savings Plan (TSP) is a tax-advantaged retirement savings plan for US federal employees and uniformed service members, established in 1986 with employer matching contributions.
Thrift Shop
"Thrift Shop" is a 2012 hip-hop single by Macklemore & Ryan Lewis featuring Wanz, self-released on Macklemore, LLC from The Heist; six weeks at No. 1 on the Billboard Hot 100 and two 2014 Grammy Awards.
Thrifty Ice Cream
Thrifty Ice Cream is an American brand created in 1940 for Southern California's Thrifty Drug Stores, known for its dense, low-priced scoops cut into distinctive flat-topped cylinders.
Thrifty Ways to Thieve Your Mother
Thrifty Ways to Thieve Your Mother is The Simpsons season 37 premiere (791st episode), aired September 28, 2025. Written by Jessica Conrad; Lisa wears Marge's 1990s clothes, joins an elite fashion club, and the members turn to stealing vintage outfits.
Thrill Kill
Thrill Kill: unreleased 1998 PlayStation 3D fighting game by Paradox Development and Virgin Interactive; four-player kill-meter combat, Hell tournament setting, ESRB AO rating; cancelled by Electronic Arts after acquiring Virgin and leaked online.
Thrill Pill
Thrill Pill (Трилл Пилл) is the stage name of Timur Samedov, a Russian rapper born in 2000, best known for the 2019 hit «Грустная песня» with Егор Крид and Morgenshtern.
Thrilla in Manila
Thrilla in Manila: the third Ali-Frazier heavyweight title fight, October 1, 1975, Araneta Coliseum, Quezon City. Ali won by 14th-round TKO when Eddie Futch stopped the fight; widely ranked boxing's greatest bout.
Thriller (album)
Thriller is Michael Jackson's sixth studio album, released 30 November 1982 on Epic Records and produced by Quincy Jones. Nine tracks yielded seven Top Ten singles, 37 weeks at No. 1, eight 1984 Grammys, and best-selling-album-of-all-time status, with 34x diamond US certification.
Thriller (genre)
Thriller (genre): fiction, film, and television built on suspense, tension, and high stakes, distinct from mystery by live danger rather than a solved past crime; subgenres include psychological, spy, legal, political, medical, and techno-thrillers.
Thriller (song)
"Thriller" is a 1982 Michael Jackson song written by Rod Temperton and produced by Quincy Jones, the seventh single from the album Thriller; it peaked at No. 4 on the Billboard Hot 100 and its John Landis short film is the only music video in the National Film Registry.
Thriller 40 (film)
Thriller 40 is a 2023 Nelson George documentary about the making of Michael Jackson's Thriller album, streaming on Paramount+ with Showtime from December 2, 2023, with interviews and unseen footage.
Thriller film
Thriller film: a suspense-driven movie genre built on high stakes, anticipation, and danger; also called suspense thriller. Defined as a metagenre spanning spy, crime, horror, and psychological thrillers, from Griffith and Hitchcock to today's domestic thrillers.
Thripidae
Thripidae (common thrips, true thrips) is a family of Thysanoptera, Terebrantia, founded by Stephens in 1829; over 2100 species in four subfamilies, containing most pest thrips and all tospovirus vectors.
Thrips
Thrips (order Thysanoptera) are minute fringed-wing insects, about 6,500 described species, sister to Hemiptera; key species such as Frankliniella occidentalis and Thrips tabaci are major crop pests and tospovirus vectors managed through IPM.
Thrips palmi
Thrips palmi (melon thrips, oriental thrips), a yellow 1.0-1.3 mm polyphagous thrips of Cucurbitaceae and Solanaceae; EPPO A1 quarantine pest, tospovirus vector, 17.5-day life cycle at 25°C.
Thrissur (തൃശ്ശൂർ)
Thrissur (തൃശ്ശൂർ), or Trichur, is the cultural capital of Kerala, India, built around Vadakkunnathan Temple and famed for Thrissur Pooram, founded as a modern city by Sakthan Thampuran (1790–1805) and a banking hub.
Thrissur District
Thrissur District (തൃശ്ശൂർ ജില്ല), a revenue district of central Kerala, India; cultural capital of Kerala, home of Thrissur Pooram. Area 3,032 km², 2011 population 3,110,327, gold jewellery and banking hub.
Thrissur Pooram (തൃശ്ശൂര് പൂരം)
Thrissur Pooram, also called Trichur Pooram, is a 36-hour temple festival held each April–May at the Vadakkunnathan Temple in Thrissur, Kerala, famed for caparisoned elephants, percussion orchestras, and fireworks.