All articles starting with S
44,216 articles
Superior vena cava
Superior vena cava (SVC): the largest central systemic vein, draining upper-body blood to the right atrium; formed by brachiocephalic veins, joined by the azygos vein; obstruction causes SVC syndrome, treated by stenting.
Superior vena cava syndrome
Superior vena cava syndrome (SVCS, SVC obstruction): symptoms from blockage of the superior vena cava, ~70% malignant (lung cancer) and ~30% device-related; treated with stenting, radiotherapy, chemotherapy, or anticoagulation.
Superiority complex
Superiority complex: Adlerian term for an exaggerated sense of one's abilities from overcompensating for inferiority; not a DSM-5-TR diagnosis; measured by the SUCOMP scale; distinct from narcissism and self-esteem.
Superiority trial
A superiority trial is a randomized clinical trial designed to show that a new treatment is more effective than a comparator such as placebo or an active control.
Superjail!
Superjail! is an Adult Swim animated series created by Christy Karacas and Stephen Warbrick, set in a volcano prison, known for psychedelic hand-drawn animation, extreme TV-MA-V violence, and David Wain as the Warden.
Superjunction MOSFET
A superjunction MOSFET is a vertical silicon power transistor whose charge-balanced p and n columns allow much lower on-resistance than conventional planar devices of the same voltage.
Superkart
Superkart: long-circuit racing kart with complete bodywork, FIA Group 4 class of 250 cm³, ~100 HP twin-cylinder engines, 215 kg minimum with driver, raced on car circuits like Silverstone at up to 240 kph.
SuperKEKB
SuperKEKB is an energy-asymmetric electron-positron B-factory collider at KEK in Tsukuba, Japan, built as an upgrade of KEKB to host the Belle II detector and pursue precision flavor physics.
Superland (Israel)
Superland (סופרלנד) is Israel's largest amusement park, opened 1991 in western Rishon LeZion on 80 dunams with 26 rides, owned by Entertainment City Ltd., known for the Kumba inverted coaster and Congo river ride.
Superlattice
A superlattice is a synthetic periodic multilayer of chemically distinct layers with a period larger than the crystal lattice constant, introduced by Esaki and Tsu in 1970 to engineer electronic band structure.
Superlek Kiatmuu9 (ซุปเปอร์เล็ก เกียรติหมู่9)
Superlek Kiatmuu9 (ซุปเปอร์เล็ก เกียรติหมู่9), born Manachai Yamsiri in 1995, is a Thai Muay Thai and kickboxing fighter, "The Kicking Machine", a two-division ONE World Champion who beat Rodtang, Takeru, and Haggerty before injuries in 2026.
Superlens
A superlens is a lens, usually a negative-index metamaterial slab, that images below the diffraction limit by recovering evanescent waves; John Pendry proposed it in 2000.
Superliner (railcar)
The Superliner is a bi-level long-distance passenger railcar operated by Amtrak, built in two generations by Pullman-Standard in the late 1970s and by Bombardier in the 1990s.
Superlópez
Superlópez (2018) is a Spanish superhero comedy directed by Javier Ruiz Caldera, starring Dani Rovira as Jan's 1973 comic character; it grossed over €12.5 million in Spain and won the Goya for best special effects.
Superlubricity
Superlubricity is the friction regime in which the coefficient between two sliding crystal surfaces falls to 0.01 or lower, first proposed in 1990 and observed in graphite in 2004.
Superluminal motion
Superluminal motion, also called superluminal velocity, is the apparent faster-than-light movement of features such as knots in relativistic jets, an illusion produced by light-travel-time effects first measured in quasars in 1971.
Superluminescent diode
A superluminescent diode (SLD), also called a superluminescent LED (SLED), is a semiconductor light source combining a laser diode's brightness with an LED's broad, low-coherence spectrum.
Superluminous supernova
A superluminous supernova is a stellar explosion more than 100 times brighter than an ordinary supernova, defined as a class by Robert Quimby and colleagues in 2011.
SuperM (슈퍼엠)
SuperM (슈퍼엠) was a seven-member K-pop supergroup of SHINee, EXO, NCT 127, and WayV idols, launched by SM Entertainment and Capitol Music Group on October 4, 2019; its debut EP topped the Billboard 200 with 168,000 units, a first for a K-pop debut, before the group went inactive after 2023.
Supermajority
Supermajority: a voting threshold above simple majority (three-fifths, two-thirds, three-fourths) for constitutional amendment, treaties, vetoes, and referendums; distinct from the filibuster's de facto Senate 60-vote rule.
Superman
Superman is a DC Comics superhero created by Jerry Siegel and Joe Shuster (aka Clark Kent, Kal-El), debuting in Action Comics #1, June 1938; sold rights for $130, weakened by Kryptonite, based in Metropolis.
Superman (1941 film)
Superman (1941), also called The Mad Scientist or The Death Ray, is the first Fleischer Studios animated Superman short, directed by Dave Fleischer, released September 26, 1941 by Paramount, with the energy-cannon plot, Bud Collyer's voice, an Oscar nomination, and Superman's first screen flight.
Superman (1978 film)
Superman, also known as Superman: The Movie, is a 1978 superhero film directed by Richard Donner and starring Christopher Reeve, credited with establishing the superhero film as a mainstream genre.
Superman (2025 film)
Superman, formerly Superman: Legacy, is a 2025 American superhero film written and directed by James Gunn, the first theatrical film of the new DC Universe, starring David Corenswet as Superman.
Superman (2025 soundtrack)
Superman (Original Motion Picture Soundtrack) is the 2025 WaterTower Music score album for James Gunn's Superman film, composed by John Murphy and David Fleming, released July 8, 2025, adapting John Williams' 1978 theme.
Superman (franchise)
The Superman franchise is the series of film and television adaptations of the DC Comics superhero created by Jerry Siegel and Joe Shuster, running from 1940s serials through 2025.
Superman & Lois
Superman & Lois (2021-2024) was a CW superhero drama by Greg Berlanti and Todd Helbing starring Tyler Hoechlin and Elizabeth Tulloch as married Clark Kent and Lois Lane raising sons in Smallville, the final Arrowverse-era series to end.
Superman & Lois season 4
Superman & Lois season 4 is the 10-episode final season of The CW's Superman & Lois, airing October to December 2024 with Lex Luthor (Michael Cudlitz) and Doomsday, made under heavy budget cuts and ending the Arrowverse era.
Superman 64
Superman 64 (Superman: The New Superman Adventures) is Titus Interactive's 1999 Nintendo 64 action game based on Superman: The Animated Series, infamous for ring-flying levels, Kryptonite fog, broken controls, and a 30/100 Metacritic score.
Superman and the Mole-Men
Superman and the Mole-Men (1951) is the first feature-length Superman film, a 58-minute black-and-white Lippert Productions pilot starring George Reeves and Phyllis Coates, later re-edited into the Adventures of Superman two-parter "The Unknown People".