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Superior highly composite number
A superior highly composite number is an integer that maximizes the divisor-count ratio d(n)/n^ε for some ε, introduced by Srinivasa Ramanujan in his 1915 memoir on highly composite numbers.
Superior laryngeal nerve
Superior laryngeal nerve (nervus laryngeus superior), a vagus nerve branch dividing into an internal sensory branch to the supraglottic larynx and an external motor branch to the cricothyroid muscle; injury causes pitch-range loss and dysphagia.
Superior limbic keratoconjunctivitis
Superior limbic keratoconjunctivitis (SLK, Theodore's syndrome) is a chronic relapsing inflammation of the superior bulbar and tarsal conjunctiva and superior limbus, mainly in women aged 30–55, linked to thyroid eye disease and dry eye.
Superior mesenteric artery
Superior mesenteric artery (SMA): second anterior branch of the abdominal aorta at L1, supplying the midgut from duodenum to splenic flexure via jejunal, ileal, ileocolic, right colic, and middle colic branches; linked to mesenteric ischemia, SMA syndrome, and nutcracker syndrome.
Superior mesenteric artery syndrome
Superior mesenteric artery syndrome, or Wilkie's syndrome, is rare duodenal obstruction from compression of the third duodenum between the aorta and superior mesenteric artery, usually after rapid weight loss; treated first with nutrition and positioning, then duodenojejunostomy.
Superior mesenteric vein
Superior mesenteric vein (SMV): large abdominal vein draining the small intestine, right colon, pancreas, stomach, and appendix; runs right of the superior mesenteric artery and joins the splenic vein behind the pancreas to form the portal vein.
Superior olivary complex
Superior olivary complex (SOC), or superior olive: cluster of auditory nuclei in the caudal pontine tegmentum, first site of binaural convergence; MSO computes interaural time differences, LSO level differences, for sound localization.
Superior orbital fissure
The superior orbital fissure is a cleft in the sphenoid bone connecting the orbit to the middle cranial fossa and transmitting cranial nerves III, IV, V1, and VI.
Superior orders
Superior orders, or obedience to superior orders, is a criminal-law plea that an act was done on a superior's command. Denied by the Nuremberg and Tokyo charters, it survives at the ICC under Rome Statute Article 33 only for war crimes where the order was not manifestly unlawful.
Superior refinery (Cenovus)
The Superior Refinery is an oil refinery in Superior, Wisconsin, the state's only refinery. Built in 1950, it processes 49,000 barrels per day for Cenovus Energy.
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.