All articles starting with S
44,216 articles
Secale
Secale is a Poaceae genus of Triticeae grasses including cultivated rye (Secale cereale), domesticated from weedy rye, grown on 4.1 million ha mostly in northeastern Europe, high in dietary fiber, and a gluten and allergen source.
SECAM
SECAM, short for Séquentiel couleur à mémoire, is a French analog color television system invented by Henri de France, used mainly in France, the USSR, and francophone Africa.
Secant line
A secant line is a straight line that cuts a curve at two or more points. Its slope gives the average rate of change, and its limit is the tangent line.
Secant method
The secant method is an iterative numerical algorithm for finding a root of a function using two starting values and no derivative, converging at rate about 1.618.
Secaro
Secaro, formerly Manufacture 2030, is a London-based supply-chain carbon management software company serving manufacturers like Toyota and Honda, acquired by Japan's ASUENE for about $37 million in 2026.
Secaucus Junction
Secaucus Junction, formally the Frank R. Lautenberg Rail Station, is a New Jersey Transit station opened in 2003 where passengers transfer between lines to reach Penn Station New York.
Secaucus, New Jersey
Secaucus is a town in Hudson County, New Jersey, on the Hackensack River in the Meadowlands, population 22,181 (2020), a distribution and transit hub near Secaucus Junction, distinct from other Meadowlands municipalities.
Secbumeton
Secbumeton (etazine, isobumeton) is an obsolete methoxytriazine herbicide, C10H19N5O, CAS 26259-45-0, first reported 1966 by Ciba-Geigy; photosystem II inhibitor formerly used on grapes, alfalfa, and sugarcane, now not approved in the EU.
Secca
Secca (Italian for a submerged shoal or rocky rise) names Mediterranean dive sites such as Secca due Balconi off Arenzano and Secca del Papa off Sardinia, plus unrelated organizations: La Secca sports club, SECCA Racing, and SECCA art centers.
Secchi (Martian crater)
Secchi is a 234-km-wide impact crater on Mars at 58°S, 101.9°E, near Hellas, named for Angelo Secchi, the astronomer who first used "canale" for Martian linear features.
Secchi disk
A Secchi disk is a plain white or black-and-white disk lowered into water until it vanishes, measuring water transparency, named for Pietro Angelo Secchi in 1865.
Seccomp
Seccomp (secure computing mode) is a Linux kernel facility that lets a process restrict which system calls it may make, used by Docker, Chrome, and Firefox.
Secessio plebis
Secessio plebis, the secession of the plebs, was the mass withdrawal of Rome's plebeians to hills outside the city, a general-strike tactic of the Conflict of the Orders that won the tribunate (494 BCE) and the lex Hortensia (287 BCE).
Secession
Secession is a territory's unilateral withdrawal from a state to form a new one. International law neither prohibits it nor grants a right to it; the 2010 ICJ Kosovo advisory opinion and the Quebec Reference frame the debate.
Secession in the United States
Secession in the United States: attempted withdrawal of states from the Union, culminating in the 1860–61 Southern secession and settled by Texas v. White (1869), which held the Union indissoluble.
Secessionist movements of Canada
Secessionist movements of Canada: Quebec sovereignty (Parti Québécois, 1980 and 1995 referendums, Clarity Act) and Alberta separatism (2026 referendum, Freedom Convoy origins, ~22% support).
Sech (singer)
Sech (Carlos Isaías Morales Williams, born 1993, Río Abajo, Panama), also called El Peluche, is a Panamanian urbano singer. Known for "Otro Trago" (No. 1 Hot Latin Songs), albums Sueños, 1 of 1, 42, Tranki Todo Pasa, Secho Gang; seven Latin Grammy nominations.
Sechele I
Sechele I was kgosi of the BaKwena in Botswana from about 1833 to 1892, known for leading Tswana resistance to the Boers in the 1852-53 war.
Sechín
Sechín is a group of archaeological monuments in the Casma Valley of coastal Peru, including Cerro Sechín and Sechín Bajo, built between about 3700 and 1300 BC.
Sechs Kies (젝스키스)
Sechs Kies (젝스키스, Sechskies) is a South Korean boy group that debuted April 15, 1997 under Daesung Entertainment, rivaled H.O.T. in 1990s K-pop, disbanded in 2000, and reunited under YG in 2016.
Sechsundsechzig
Sechsundsechzig (66, Sixty-Six) is a classic German two-player, 24-card trick-and-draw marriage game won by first reaching 66 card points; its Austrian 20-card descendant is Schnapsen.
Seckel syndrome
Seckel syndrome (bird-headed dwarfism, OMIM 210600) is a rare autosomal recessive microcephalic primordial dwarfism with prenatal-onset short stature, bird-headed facies, and intellectual disability, caused by genes such as ATR, CENPJ, and CEP152.
Seckmauern
Seckmauern is a village in Lützelbach, Odenwaldkreis, Hesse, Germany, first recorded about 1248, with 1,554 residents in 2021. It hosts Kastell Seckmauern (ORL 46b), an early, short-lived Roman numerus fort on the Odenwald Limes, discovered in 1901.
Secnidazole
Secnidazole (Solosec) is a long-half-life 5-nitroimidazole antimicrobial given as a single 2 g oral dose for bacterial vaginosis and trichomoniasis; FDA-approved 2017 (BV) and 2021 (trichomoniasis), similar to metronidazole, possibly inferior to ornidazole.
Secobarbital
Secobarbital, known as quinalbarbitone in Britain and sold as Seconal in red capsules, is a short-acting barbiturate sleep medication discontinued in the United States in 2020.
Secoda
Secoda is a Toronto-based software company founded in 2021 by Etai Mizrahi and Andrew McEwen offering an AI-powered data catalog, lineage, governance, and observability platform; YC S21, $16M raised, acquired by Atlassian in December 2025 for Rovo integration. Distinct from SECODA anomaly detection and UK SECODA LIMITED.
Secolul 20
Secolul 20, Romanian for "The 20th Century," was a Romanian literary magazine of world literature published in Bucharest from 1961 until it was renamed Secolul 21 in 2001.
Secom
Secom (セコム) is a Japanese integrated security services company founded in 1962 as Japan's first security firm, known for monitored security systems backed by emergency dispatch from about 2,500 depots.
Seconal barbituric acid)
Seconal, 5-allyl-5-(1´-methylbutyl) barbituric acid, EU ID 1128, is a barbituric acid derivative listed as not approved in EU pesticide data, with a default MRL of 0.01 mg/kg.
Second (SI unit of time)
The second (symbol s) is the SI base unit of time, defined by the caesium-133 hyperfine transition frequency of exactly 9,192,631,770 Hz, in force since 2019.