All articles starting with S
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Sublingual varices
Sublingual varices, also called caviar tongue or lingual varicosities, are benign dilated tortuous veins under the tongue, affecting roughly 23–35% of adults, increasing with age, and associated with hypertension, smoking, and cardiovascular disease.
Sublobar resection
Sublobar resection is an operation for early-stage non-small-cell lung cancer that removes part of a lung lobe rather than the whole lobe, preserving more lung function.
Subluxation
Subluxation: in medicine, a partial joint dislocation; in chiropractic, a putative spinal lesion central to the profession since DD Palmer's 1895 founding, whose detection and clinical significance remain scientifically contested.
Subluxation of tooth
Subluxation of tooth (ICD-11 NA0D.11): a traumatic dental injury to periodontal tissues causing abnormal tooth loosening without displacement, with gingival sulcus bleeding; managed conservatively with soft diet and radiographs.
Submachine gun
A submachine gun is a hand-held, magazine-fed, shoulder-fired automatic weapon that fires pistol ammunition; after World War II it was largely replaced militarily by the assault rifle.
Submandibular gland
Submandibular gland: paired major salivary gland below the mandible, second largest after the parotid; drains via Wharton's duct, makes ~70% of resting saliva, and accounts for over 80% of salivary stones.
Submarine
A submarine is a watercraft capable of operating fully submerged, using ballast tanks to dive and surface while carrying its own power plant, air supply, and weapons.
Submarine (2010 film)
Submarine (2010) is a British coming-of-age comedy-drama, Richard Ayoade's feature directorial debut, adapted from Joe Dunthorne's 2008 novel. Set in 1980s Swansea, it stars Craig Roberts, Yasmin Paige, Sally Hawkins, Noah Taylor, and Paddy Considine, produced by Warp Films and Film4 with an Alex Turner soundtrack.
Submarine (The Marías album)
Submarine is The Marías' second studio album, released May 31, 2024 on Nice Life/Atlantic; 14 dream-pop, jazz and disco tracks written by María Zardoya and Josh Conway after their breakup, featuring "No One Noticed."
Submarine aircraft carrier
A submarine aircraft carrier is a submarine carrying and launching floatplanes, used by several navies between the world wars and deployed in quantity by Japan in World War II.
Submarine canyon
Submarine canyons are steep-walled valleys cut into continental slopes by turbidity currents, linking shelves to the deep sea. About 5,849 large canyons are mapped globally; they transport sediment, drive carbon sequestration, and host deep-sea biodiversity hotspots.
Submarine communications cable
A submarine communications cable is a fiber-optic cable laid on or beneath the seabed, carrying about 99% of international data traffic; the first was laid in 1850.
Submarine depth ratings
A submarine depth rating is the maximum depth at which a submarine can operate, distinguished as test depth, maximum operating depth, and collapse depth, each with a different safety margin.
Submarine fan
A submarine fan is a large sediment accumulation on the ocean floor, built by turbidity currents; the Bengal Fan, the largest, is about 3000 km long.
Submarine films
Submarine films: a film genre centered on submarines and undersea vessels, from the Williamson Submarine Tube (1914) and Capra's Submarine (1928) through Das Boot, Cold War thrillers, and documentary hybrids.
Submarine groundwater discharge
Submarine groundwater discharge (SGD) is the flow of water from the seabed into the coastal ocean, combining fresh groundwater and seawater recirculated through coastal sediments.
Submarine landslide
A submarine landslide is the downslope movement of sediment or rock on the seafloor under gravity, occurring on slopes as gentle as 1 degree, destroying seabed infrastructure, and generating tsunamis.
Submarine morphology
Submarine morphology: the study of seafloor landforms from continental shelf and slope to abyssal plains, trenches, and seamounts, shaped by tectonics, turbidity currents, and sediment supply, and mapped by sonar and altimetry.
Submarine power cable
A submarine power cable is an insulated cable laid on or buried in the seabed to transmit power across water, first installed in Germany in 1811.
Submarine sandwich
Submarine sandwich (sub, hero, hoagie, grinder, po' boy): a long split roll filled with cold cuts, cheese, and vegetables, an Italian-American creation; "sub" dominates nationally while "hoagie" is Philadelphia's regional term, first printed as "submarine sandwich" in 1940.
Submarine Telegraph Company
The Submarine Telegraph Company was a British company founded in 1851 by Jacob Brett and John Watkins Brett to lay the first commercially successful submarine telegraph cable, between Dover and Calais.
Submarine Warfare insignia
Submarine Warfare insignia, or "dolphins," the U.S. Navy breast pin for personnel qualified in submarines; proposed by Captain Ernest J. King in 1923, approved March 1924, gold for officers and silver for enlisted.
Submarine-launched ballistic missile
A submarine-launched ballistic missile (SLBM) is a long-range nuclear missile fired from a ballistic missile submarine, first deployed by the United States with Polaris in 1960.
Submarine-launched cruise missile
A submarine-launched cruise missile (SLCM) is a cruise missile launched from a submarine, submerged or surfaced. Principal examples are the US Tomahawk and the Russian Kalibr.
Submarines in the United States Navy
The US Navy's submarines, also called the US Submarine Force, are nuclear-powered vessels in four classes totaling about 67 boats, performing attack, strike, and nuclear deterrence missions.
Submer
Submer is a Barcelona-based technology company founded in 2015 by Daniel Pope and Pol Valls that builds single-phase immersion cooling systems for data centers, and has since expanded into data center development and AI infrastructure.
Submerged arc furnace
A submerged arc furnace (SAF), also called an arc-resistance furnace, is an electric furnace with carbon electrodes buried in the charge, the predominant unit for producing ferroalloys like ferrochrome.
Submerged arc welding
Submerged arc welding (SAW) is a high-current arc welding process in which the arc and weld pool are buried under granular flux, used for thick plates in shipbuilding and pipelines.
Submerged combustion vaporizer
A submerged combustion vaporizer (SCV) is a fired heat exchanger that regasifies liquefied natural gas by burning fuel gas in a burner immersed in a water bath.
Submerged fermentation
Submerged fermentation is a cultivation method in which microorganisms grow suspended in aerated liquid medium, the backbone of industrial biotechnology and over 75% of industrial enzyme production.