All articles starting with S
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Serious Sam
Serious Sam is a first-person shooter franchise by Croatian studio Croteam, starting with The First Encounter (2001, Metacritic 87), known for horde-based arena combat, the Serious Engine, and games through Serious Sam 4 (2020) and Shatterverse (2026).
Serious Sam: Shatterverse
Serious Sam: Shatterverse is a 1–5 player co-op roguelite FPS by Behaviour Interactive, published by Devolver Digital, released August 31, 2026 on PC, PS5, and Xbox Series X|S; alternate-dimension Sams fight Uber Mental's five lieutenants.
Seriti Resources
Seriti Resources is a majority black-owned South African mining company producing thermal coal for Eskom power stations and export markets, supplying more than 30% of Eskom's coal.
Seriyye Sicilleri
Seriyye Sicilleri (Şer'iyye Sicilleri) are the registers kept by kadis of the Ottoman Empire's sharia courts from 1455 until the courts were abolished in 1924, recording cases, contracts, and deeds.
Serizawa Kamo
Serizawa Kamo (芹沢鴨), born Kimura Tsuguji, was a ronin from Mito domain and one of the original commanders of the Shinsengumi, killed in an internal purge in Kyoto in 1863.
Serizawa Keisuke
Serizawa Keisuke (芹沢銈介) was a Japanese textile artist who invented the kata-ezome stencil-dyeing technique, was named a Living National Treasure in 1956, and joined the Mingei folk craft movement.
Serj Tankian
Serj Tankian (born 1967), Armenian-American singer, songwriter, and activist; founder and lead vocalist of System of a Down, Grammy winner for "B.Y.O.B.", and solo artist behind Elect the Dead and Invocations.
Serket
Serket (Serqet, Selket, Selkis) is an ancient Egyptian scorpion goddess of protection, healing, and magic, "She Who Causes the Throat to Breathe"; a Predynastic mother goddess with no temples, whose priests were physicians and who guarded Qebehsenuf's canopic jar.
Serlingpa
Serlingpa, known in Sanskrit as Dharmakirti of Suvarnadvipa, was a Buddhist master of the Shrivijaya world, flourishing around 1000, best remembered as the most important of Atisha's teachers.
Serlopitant
Serlopitant (VPD-737, MK-0594) is an investigational oral NK1 receptor antagonist developed by Merck and Menlo Therapeutics for chronic itch; positive phase 2 pruritus and psoriasis trials but failed phase 3 prurigo and atopic dermatitis studies.
Şermin
Şermin is a 1914 book of 31 children's poems by Turkish poet Tevfik Fikret, his last work and the first Turkish children's poetry book in syllabic meter.
Sermon
A sermon is a religious discourse expounding a sacred text, delivered to a gathered community as part of worship; the Christian homily is its simpler liturgical form.
Sermon on Law and Grace
The Sermon on Law and Grace (Слово о законе и благодати) is a theological homily written in Kyiv between 1037 and 1050 by Hilarion, later Metropolitan of Kyiv.
Sermon on the 'Mount (South Park)
Sermon on the 'Mount is the premiere of South Park season 27 (July 23, 2025), written by Trey Parker, satirizing Trump and Paramount Skydance; it drew nearly 6 million viewers and was announced alongside a $1.5 billion, 50-episode renewal deal.
Sermon on the Mount
The Sermon on the Mount is a block of Jesus's teaching in the Gospel of Matthew, chapters 5 through 7, opening with the Beatitudes and containing the Lord's Prayer.
Sermorelin acetate
Sermorelin acetate (Geref), a 29-amino-acid GHRH analogue stimulating pituitary growth hormone release; FDA-approved 1990 and 1997, withdrawn 2009 for commercial reasons, now compounded only.
Sernageomin
Sernageomin (Servicio Nacional de Geología y Minería) is Chile's national geology and mining service, created in 1980 to map the country's geology, monitor its volcanoes, and regulate mining safety.
Seroconversion
Seroconversion, also called the appearance of detectable antibodies, is the change from antibody-negative to antibody-positive blood after infection or vaccination; its preceding window period (HIV 10–90 days by test type) governs HIV diagnosis and blood donor screening safety.
Serogroup
Serogroup: a non-taxonomic grouping of antigenically related bacterial serovars or serotypes sharing surface LPS or capsular polysaccharides, used in Leptospira, meningococcal, pneumococcal, and Salmonella typing, surveillance, and vaccine design.
Serologic tests
Serologic tests, also called serological tests, are blood-based laboratory tests that detect antibodies or antigens in serum to diagnose infections, check immune status after vaccination, and identify autoimmune disease.
Serological testing
Serological testing detects antibodies or antigens in blood serum to diagnose infection, establish immune status, or document exposure, using methods such as ELISA, agglutination, and complement fixation.
Serology
Serology: laboratory study of blood serum antibodies to diagnose past infection, guide vaccination, and screen blood; includes IgM/IgG tests, immunoassays, and prevalence-dependent predictive values.
Seroma
Seroma: a pocket of serous fluid (plasma and lymph) collecting in a dead space, usually after surgery such as mastectomy, abdominoplasty, or hernia repair; often resolves spontaneously, otherwise aspirated, drained, or sclerosed.
Seronegative rheumatoid arthritis
Seronegative rheumatoid arthritis (SNRA): RA negative for rheumatoid factor and ACPA, 20-30% of cases; distinct genetics, diagnostic delays, erosive potential, and attenuated response to rituximab.
Seropositive rheumatoid arthritis
Seropositive rheumatoid arthritis: RA subset defined by rheumatoid factor and/or ACPA autoantibodies, about two-thirds of cases, more severe course, MHC class II-linked, lung-triggered, with distinct biologic treatment responses.
Seroprevalence survey
A seroprevalence survey is an epidemiological study measuring the proportion of a population with antibodies against a pathogen, capturing infections missed by case reporting; influenza antibody surveys date to the 1930s.
Serotiny
Serotiny (pyriscence) is delayed seed release in plants, where seeds are stored in woody cones or fruits and released after fire heat melts sealing resin; found in pines, Banksia, eucalypts, and cypresses.
Serotonergic neuron
Serotonergic neurons synthesize and release serotonin (5-HT) from hindbrain raphe nuclei (B1–B9 groups), about 0.015% of rat brain neurons, with TPH2/SERT/VMAT2 phenotype, rostrocaudal subtypes, and forebrain-to-spinal cord projections.
Serotonin
Serotonin (5-hydroxytryptamine, 5-HT) is a monoamine neurotransmitter made mainly in gut enterochromaffin cells and brainstem raphe nuclei, acting through 7 receptor families; central to mood, gut motility, migraine, and antidepressant drug action.
Serotonin 5-HT2A receptor agonist
Serotonin 5-HT2A receptor agonists (5-HT2AR agonists; psychedelics such as LSD, psilocin, DMT, DOI, mescaline) activate the Gq-coupled 5-HT2A receptor in cortical layer V, producing psychedelic effects above a Gq efficacy threshold of about 70%.