All articles starting with S

Scythia

Scythia: classical name for the Black Sea steppe homeland of the Scythians, Iranian-speaking nomads of the 7th–4th centuries BCE, known from Herodotus, Akkadian texts, and kurgan archaeology.

Scythian campaign of Darius I

The Scythian campaign of Darius I was a Persian expedition around 513 BCE, in which Darius crossed the Danube against the Scythians and withdrew after they refused battle.

Sep 19, 2026

Scythian domination of Media

The Scythian domination of Media is the period of Scythian overlordship over the Medes reported by Herodotus, traditionally dated c. 653–625 BC and associated with the Scythian king Madyes.

Scythian goldwork

Scythian goldwork is the gold jewelry, weapon decoration, and horse trappings made for the nomadic Scythians of the Eurasian steppe, chiefly between the 7th and 4th centuries BCE.

Sep 19, 2026

Scythian incursion into the Near East

The Scythian incursion into the Near East was a series of raids by nomadic horsemen from the steppes into Urartu, Mannea, and Assyria during the 7th century BCE.

Scythian languages: Old Iranian idioms of the Eurasian steppe nomads, attested only fragmentarily through names recorded by Assyrians, Persians, and Greeks, especially Herodotus; ancestors of Sarmatian, Alanic, and modern Ossetic.

Scythian migration into the Pontic steppe

The Scythian migration into the Pontic steppe was the movement of Iranian-speaking nomads from Central Asia into the lands north of the Black Sea in the 8th and 7th centuries BCE, displacing the Cimmerians.

Scythian-Siberian animal style

The Scythian-Siberian animal style, also called the Scytho-Siberian animal style, is the stylized animal art of Early Iron Age nomads of the Eurasian Steppe, from Ukraine to Mongolia.

Scythians

The Scythians (Scythae, Skuthai) were nomadic Iranian horse-warriors of the Black Sea steppes from the 7th to 4th centuries BCE, known from Herodotus and their kurgan burials.

Scythrididae

Scythrididae (teardrop moths, flower moths) is a gelechioid microlepidoptera family of small, dark, often diurnal moths with 10-30 mm wingspans; species are identified mainly by highly diversified genitalia, with several hundred undescribed taxa known.

SD Biosensor

SD Biosensor is a South Korean in-vitro diagnostics company headquartered in Suwon, founded in 2010, whose STANDARD Q COVID-19 test was the first rapid antigen test listed by WHO.

SD card

The SD card (Secure Digital) is a removable flash memory card format announced in 1999 by Panasonic, SanDisk, and Toshiba, made in full-size and microSD forms.

SD Eibar

SD Eibar (Sociedad Deportiva Eibar), Basque football club founded 1940 in Eibar; plays at Ipurua (8,164). Reached La Liga 2014 via crowdfunding, no majority shareholder, 10,000 shareholders.

SD Express

SD Express is a high-speed interface for SD and microSD cards, defined by the SD Association in 2018, carrying data over PCIe with NVMe at up to 3940 MB/s.

SD Gundam G Generation Eternal

SD Gundam G Generation Eternal (SDガンダムジージェネレーションエターナル) is a free-to-play tactical strategy game for iOS and Android, released worldwide by Bandai Namco Entertainment in 2025.

SD Huesca

SD Huesca (Sociedad Deportiva Huesca), Spanish football club founded 29 March 1960 in Huesca, Aragon; plays at Estadio El Alcoraz (1972). First reached LaLiga in 2018, won Segunda División 2019-20, now in Primera Federación.

SD-WAN

SD-WAN (software-defined WAN) is a networking approach, first named in 2014, that centralizes control of traffic between enterprise sites and steers each application across links like MPLS, broadband, and cellular.

Sd.Kfz. 234

The Sd.Kfz. 234 was a family of German eight-wheeled heavy armored cars of the Second World War, produced from late 1943 to 1945 in four variants distinguished mainly by their armament.

Sd.Kfz. 251

The Sd.Kfz. 251 (Sonderkraftfahrzeug 251), nicknamed the Hanomag, was a German half-track armored personnel carrier of World War II that carried panzer grenadiers alongside tanks.

Sep 19, 2026

SDA Systems, later part of Cadence Design Systems

SDA Systems was a Silicon Valley electronic design automation company founded by James Solomon in 1983 to build chip design software, merging with ECAD to form Cadence in 1988.

Sda1

Sda1 names several unrelated conserved proteins: the yeast Sda1 cell-cycle and 60S ribosome biogenesis factor, human SDAD1, Arabidopsis SDA1 stress protein, and the S. pyogenes Sda1 nuclease virulence factor.

Sep 24, 2026

Sdach Kanchlung

Sdach Kanchlung (ស្តេចកន្លុង), known as Sdech Kan, was a commoner who seized Cambodia's throne in the early 1500s before being defeated by the former king's brother.

SDC Capital Partners

SDC Capital Partners is a New York investment firm founded by Todd Aaron in 2017, specializing in digital infrastructure private equity such as data centers and fiber.

SDC1

SDC1 (syndecan-1, CD138) gene encodes a type I transmembrane heparan sulfate proteoglycan on chromosome 2p24.1, first cloned in 1989, acting as a growth-factor coreceptor, cancer biomarker, and therapeutic target.

SDC2

SDC2 (syndecan 2, fibroglycan, CD362) is a human chromosome 8q22.1 gene encoding a type I transmembrane heparan sulfate proteoglycan involved in cell adhesion, migration, and development; fecal SDC2 methylation is a colorectal cancer screening biomarker.

Oct 20, 2026

SDC4

SDC4 (syndecan 4, amphiglycan, ryudocan) is a human chromosome 20q13.12 gene encoding syndecan-4, a type I transmembrane heparan sulfate proteoglycan homodimer receptor that activates PKCα, regulates integrins, focal adhesions, wound healing, and cancer.

SDCBP

SDCBP, on chromosome 8, is a human scaffold protein gene whose product syntenin, formerly MDA-9, links syndecans to signaling and exosome biogenesis and is elevated in cancers including melanoma.

Sde Teiman detention camp

Sde Teiman (מחנה שדה תימן) is an IDF detention camp in the Negev, southern Israel, established October 8, 2023 under the Unlawful Combatants Law; about 4,000 Gaza detainees passed through amid abuse allegations, deaths in custody, and a 2024 High Court case.

Sde Teiman gang rape

Sde Teiman gang rape: alleged 2024 sexual assault of a Palestinian detainee by IDF Force 100 reservists at the Sde Teiman camp in the Negev; nine arrested, five indicted in 2025, charges dropped in 2026.