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Superettan
Superettan, Sweden's second-tier men's football league since 2000, formed by merging Division 1 Norra and Södra; 16 clubs, 30 rounds, top two promoted to Allsvenskan.
Superexchange
Superexchange is a magnetic exchange interaction between magnetic ions too far apart to couple directly, mediated by virtual electron hopping through a non-magnetic ion such as oxygen.
SuperF*ckers
SuperF*ckers is a James Kochalka satirical superhero comic from Top Shelf (2005–2007, issues 271–279) and its 2012–2013 Cartoon Hangover animated web series of 12 five-minute episodes directed by Fran Krause.
Superfakes
Superfakes is an upcoming A24/UCP crime drama series created by Alice Ju for Peacock, starring Lucy Liu as a Chinatown counterfeit dealer drawn into New York's black market; filming began January 2026, expected 2027, UK on Sky and NOW.
Superfamilies 3–6 helicases (SF3–SF6)
Superfamilies 3–6 helicases (SF3–SF6) are the four classes of hexameric helicases, ring-shaped enzymes that couple ATP hydrolysis to movement of nucleic acid through a central channel.
Superfamily 1 helicases
Superfamily 1 (SF1) helicases, also called Superfamily 1 RNA helicases, are motor proteins that use ATP to unwind DNA or RNA during replication, repair, recombination, and RNA processing.
Superfast!
Superfast! is a 2015 American parody comedy spoofing the Fast and the Furious franchise, written and directed by Jason Friedberg and Aaron Seltzer, starring Alex Ashbaugh and Dale Pavinski, budgeted at $20 million and grossing about $2 million.
Superfecundation
Superfecundation: fertilization of two or more ova from the same cycle by sperm from separate acts of intercourse; heteropaternal superfecundation means twins with different fathers, confirmed by DNA testing, distinct from superfetation.
Superfest
Superfest, originally marketed as CEVERIT, was a chemically strengthened drinking glass made in East Germany from 1980 to 1990, several times more durable than ordinary glass.
Superficial bacterial folliculitis
Superficial bacterial folliculitis, also called Bockhart impetigo, is a Staphylococcus aureus infection of the hair follicle opening causing pustules; treated with topical mupirocin, clindamycin, or benzoyl peroxide, distinct from deep boils.
Superficial cervical plexus block
The superficial cervical plexus block is a regional anesthesia technique that numbs the skin of the neck by injecting local anesthetic near the cervical plexus, used most often for awake carotid endarterectomy.
Superficial epidermolytic ichthyosis
Superficial epidermolytic ichthyosis (SEI, ichthyosis bullosa of Siemens, OMIM 146800) is a rare autosomal dominant keratinopathic ichthyosis caused by KRT2 mutations, with superficial blisters at birth and milder features than epidermolytic ichthyosis.
Superficial fibromatoses
Superficial fibromatoses: benign, slow-growing fibroblastic tumors of fascia or aponeurosis, including Dupuytren contracture, Ledderhose disease, Peyronie disease, knuckle pads, pachydermodactyly, and infantile digital fibromatosis; genetically distinct from deep fibromatoses.
Superficial frostbite
Superficial frostbite (frostnip, first or second degree frostbite, ICD-11 NE40) is skin-limited freezing injury with blistering but no significant tissue necrosis, treated mainly with rapid rewarming.
Superficial ovarian endometriosis
Superficial ovarian endometriosis (ICD-11 GA10.B4), also called ovarian endometriosis NOS, is endometriosis on the ovarian cortex with typical or subtle superficial lesions, distinct from cystic ovarian endometrioma; diagnosed mainly by laparoscopy.
Superficial parotidectomy
Superficial parotidectomy is an operation in head and neck surgery that removes the superficial lobe of the parotid gland, with its tumor, while identifying and preserving the facial nerve.
Superficial siderosis
Superficial siderosis, also called superficial hemosiderosis of the CNS, is a rare neurologic disease from chronic subarachnoid bleeding causing hemosiderin deposition, with progressive hearing loss, ataxia, and pyramidal signs.
Superficial temporal artery
Superficial temporal artery (arteria temporalis superficialis): terminal branch of the external carotid artery supplying the face and scalp, dividing into frontal and parietal branches; biopsied for giant cell arteritis and used for STA-MCA bypass.
Superficial thrombophlebitis
Superficial thrombophlebitis, or superficial venous thrombosis (SVT), is clotting with inflammation in a vein just under the skin, usually varicose leg veins; it differs from DVT but coexists with it in 6 to 40% of cases.
Superficial thrombophlebitis in pregnancy
Superficial thrombophlebitis (superficial vein thrombosis, SVT) in pregnancy: inflamed, clotted superficial vein affecting about 0.1% of pregnancies, with roughly two-fold raised VTE risk, usually managed with LMWH.
Superficial vein thrombosis
Superficial vein thrombosis (SVT, superficial thrombophlebitis) is clotting in veins just under the skin, usually leg saphenous veins. About 20-25% have concomitant DVT or PE; fondaparinux or rivaroxaban for 45 days treats higher-risk cases.
Superflare
A superflare is an exceptionally energetic outburst from a star, similar to a solar flare but releasing up to about 10^36 erg, far more energy than ordinary flares.
Superfluid dark matter
Superfluid dark matter is a theoretical model proposed in 2015 by Lasha Berezhiani and Justin Khoury, in which dark matter condenses into a superfluid inside galaxies.
Superfluid helium-3
Superfluid helium-3 is the frictionless liquid phase of fermionic helium-3 below a few millikelvin, where paired atoms form a spin-triplet p-wave condensate with rich topology.
Superfluid helium-4
Superfluid helium-4 (He II) is the low-temperature phase of liquid helium-4 below the lambda point of 2.17 K, flowing with no measurable viscosity, discovered in 1938.
Superfluid stiffness
Superfluid stiffness, also called superfluid weight, measures the energy cost of varying a superconductor's macroscopic wavefunction phase, enabling dissipationless current, the Meissner effect, and conventional plus geometric contributions.
Superfluidity
Superfluidity is a quantum state of matter in which a fluid flows with no viscosity below a transition temperature, first observed in liquid helium-4 in 1938.
Superfluidity of light
Superfluidity of light is the frictionless collective flow of photons in an optical system, an analog of superfluidity in liquid helium, first proposed by Raymond Chiao in 1999.
Superfluorescence
Superfluorescence is a cooperative quantum-optical effect in which excited emitters spontaneously phase-lock, emitting a short, intense burst of coherent light with intensity scaling as the square of emitter number.
Superfluous man
The superfluous man (лишний человек) is a character type in Russian literature, typical of the 1820s to 1850s: an educated, alienated nobleman marked by skepticism and social passivity.