All articles starting with S
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Serotonin syndrome
Serotonin syndrome, or serotonin toxicity, is a potentially life-threatening drug-induced toxidrome from excess CNS serotonin, marked by neuromuscular excitation, autonomic hyperactivity, and altered mental status; severe cases usually involve MAOI plus SSRI combinations, diagnosed clinically via Hunter criteria and treated with supportive care and cyproheptadine.
Serotonin transporter
Serotonin transporter (SERT, 5-HTT, SLC6A4): presynaptic Na+/Cl−-coupled transporter that terminates serotonin signaling by reuptake; target of SSRIs, SNRIs, cocaine, and MDMA; 12-transmembrane-domain SLC6 protein with an allosteric drug site.
Serotonin-producing neuroendocrine tumor of pancreas
Serotonin-producing neuroendocrine tumor of pancreas (pancreatic carcinoid, serotoninoma, ORPHA:506090): a rare functioning pancreatic NET secreting serotonin, causing atypical carcinoid syndrome, usually metastatic to liver, diagnosed by serum 5-HT or urinary 5-HIAA.
Serotonin–norepinephrine reuptake inhibitor
Serotonin–norepinephrine reuptake inhibitors (SNRIs), including venlafaxine, duloxetine, desvenlafaxine, milnacipran, and levomilnacipran, are antidepressants blocking serotonin and norepinephrine reuptake; used for depression, anxiety, and nerve pain.
Serotyping
Serotyping is a laboratory method that classifies bacteria into serovars defined by surface antigens detected with antibodies, underpinning surveillance of Salmonella, E. coli, and other pathogens.
Serous carcinoma of the corpus uteri
Serous carcinoma of the corpus uteri (uterine serous carcinoma, USC) is a rare, aggressive type II endometrial cancer, under 10% of cases but a large share of deaths, marked by TP53 mutation and treated with surgery plus chemotherapy.
Serous conjunctivitis, except viral
Serous conjunctivitis, except viral (ICD-10-CM H10.23; ICD-11 9A60.6) is a diagnostic classification for acute conjunctivitis with clear, watery discharge not attributed to a virus, coded by laterality subcodes H10.231-H10.239.
Serous cystadenocarcinoma of pancreas
Serous cystadenocarcinoma (SCAc) of the pancreas, also called serous cystic neoplasm with malignant transformation, is the rare malignant counterpart of serous cystadenoma, with fewer than 40 reported cases; it shows glycogen-rich clear cells, frequent liver metastasis, and relatively good survival after resection.
Serous detachment of retinal pigment epithelium
Serous detachment of retinal pigment epithelium (serous PED; ICD-10 H35.729, ICD-11 9B78.60) is serous fluid separating the RPE from Bruch membrane, seen mainly in neovascular AMD and central serous chorioretinopathy, diagnosed by OCT, with no proven treatment and RPE tear as the key complication.
Serous fluid
Serous fluid, or serosal fluid, is the clear, serum-like fluid secreted by serous membranes to lubricate the pleural, pericardial, and peritoneal cavities; its pathological buildup is called an effusion.
Serous membrane
Serous membrane (serosa): mesothelium plus connective tissue lining closed body cavities; pleura, pericardium, peritoneum; parietal and visceral layers; secretes friction-reducing serous fluid; transports fluid, aids repair, inflammation, and tumor adhesion.
Serous retinal detachment
Serous retinal detachment (exudative retinal detachment, ICD-11 9B73.3): subretinal fluid separates the retina from the RPE without a break, caused by CSC, inflammation, tumors, or hypertension; treated medically.
Serous secreting cell
Serous secreting cell (serous cell, CL:0000313) is an exocrine gland cell secreting watery, protein-rich, mucin-free fluid; found in salivary, pancreatic, lacrimal, and airway glands, it secretes most salivary fluid plus antimicrobials like lysozyme and lactoferrin.
Serowe
Serowe is a large village in Botswana's Central District and the traditional capital of the Bamangwato people, established in 1902 and the birthplace of Botswana's first president, Seretse Khama.
Serowe: Village of the Rain Wind
Serowe: Village of the Rain Wind is a 1981 work of creative nonfiction by Bessie Head presenting the history of Serowe, Botswana, through villagers' own words.
Serp Facula
Serp Facula is a facula, a bright pyroclastic deposit, on Mercury, lying in the crater Picasso near the equator; its name, approved in 2025, is Catalan for snake.
Serpenoid curve
The serpenoid curve is a mathematical curve with sinusoidally varying curvature that approximates a snake's undulating body, proposed by Shigeo Hirose of the Tokyo Institute of Technology in 1972 and widely used to control snake robots.
Serpens
Serpens is a constellation representing the serpent held by Ophiuchus, the only one of the 88 IAU constellations divided into two disconnected parts, containing the Eagle Nebula and Messier 5.
Serpens Cloud
The Serpens cloud, or Serpens Molecular Cloud, is a nearby star-forming molecular cloud in the constellation Serpens, part of the Aquila Rift, containing over 2000 young stars including the Serpens Main and Serpens South clusters.
Serpent (character)
Serpent (Cul Borson) is a Marvel Comics Asgardian god of fear, Odin's older brother, created by Matt Fraction and Stuart Immonen in Fear Itself #1 (2011); freed by Sin, he empowered the Worthy with seven hammers before Thor killed him.
Serpent (instrument)
Serpent (instrument): a bass brass-family wind instrument of leather-covered wood in S shape, invented around 1590 by Edmé Guillaume of Auxerre; used for church plainsong and military bands, replaced by the ophicleide and tuba, revived since the 1970s.
Serpent Mound
Serpent Mound (Great Serpent Mound) is a 1,348-foot (411 m) prehistoric effigy mound of a serpent with curled tail in Adams County, Ohio, near Peebles; its builders are debated between Adena (~300 BC) and Fort Ancient (~AD 1100) cultures.
Serpent seed
Serpent seed, also called the two-seed doctrine, is an interpretation of Genesis holding that Eve's sin was sexual contact with the serpent, making Cain Satan's son.
Serpent's Path (1998 film)
Serpent's Path (蛇の道, Hebi no michi) is Kiyoshi Kurosawa's 1998 V-cinema revenge thriller with Sho Aikawa and Teruyuki Kagawa, shot back-to-back with Eyes of the Spider; 85 minutes, released February 21, 1998, restored in 4K in 2024.
Serpent's Path (2024 film)
Serpent's Path (Hebi no michi, 蛇の道; La voie du serpent) is Kiyoshi Kurosawa's 2024 French-language self-remake of his 1998 thriller, set near Paris, starring Ko Shibasaki and Damien Bonnard, released in Japan June 14, 2024.
Serpent's Walk
Serpent's Walk, also Serpent's Walk (Calverhall), is a 1991 neo-Nazi dystopian science fiction novel by M.A.R. Barker under the pseudonym Randolph D. Calverhall, published by National Vanguard Books; it imagines surviving SS leaders seizing power in 2041 America.
Serpentine belt
The serpentine belt, also called a drive or accessory belt, is a single multi-ribbed rubber belt that uses an automatic tensioner to drive an engine's alternator, coolant pump, and other accessories.
Serpentinite
Serpentinite, also called serpentine rock, is a metamorphic rock of serpentine-group minerals formed when water reacts with olivine and pyroxene, named for its mottled green, serpent-like texture.
Serpentinization
Serpentinization: hydration of olivine- and pyroxene-rich ultramafic rock by water, producing serpentine minerals, magnetite, alkaline pH 9–11 fluids, and H2; drives Lost City-type vents, abiotic methane, origin-of-life research, and geologic hydrogen.
Serpents in the Bible
Serpents in the Bible: Hebrew nachash (נָחָשׁ), 31 occurrences; the crafty Eden serpent, fiery serpents and Nehushtan of Numbers 21 and 2 Kings 18:4, Leviathan, and the later Christian identification of the serpent with Satan.