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Siriraj Hospital
Siriraj Hospital (โรงพยาบาลศิริราช), Bangkok Noi, Thailand's first modern hospital, opened 26 April 1888 by King Chulalongkorn; teaching hospital of Mahidol University's Faculty of Medicine, with private wing SiPH, about 2,044 beds, and the Bangpho Medical Hub expansion.
Siris
Siris, Greek Σῖρις, was a wealthy ancient Greek city on the Ionian coast of southern Italy, destroyed by Sybaris, Croton, and Metapontum around 550 to 530 BC.
Siris Capital Group
Siris Capital Group is a private equity firm founded in 2011 by Frank Baker, Peter Berger, and Jeffrey Hendren, making control investments in North American technology companies.
Sirius
Sirius, also called the Dog Star or Alpha Canis Majoris, is the brightest star in the night sky, a binary system 8.6 light-years away in Canis Major.
Sirius (mythology)
Sirius (Σείριος, Seirios), the Greek Dog-Star god, brightest star of Canis Major; Orion's hound and Maera, whose rising brought summer heat, drought, and the Ceos cult of Aristaeus and the Etesian winds.
Sirius (police dog)
Sirius (badge K9 17) was a yellow Labrador explosive detection dog of the Port Authority Police Department and handler Lt. David Lim; the only police dog killed on 9/11, he died in the South Tower collapse.
Sirius B
Sirius B, also known as α Canis Majoris B, is the white dwarf companion of Sirius, roughly Earth-sized but nearly as massive as the Sun.
Sirius Black
Sirius Black (also Sirius Black III, Padfoot) is the fictional godfather of Harry Potter in J. K. Rowling's series: a Gryffindor Marauder, unregistered black-dog Animagus, and wrongly imprisoned Azkaban escapee killed by Bellatrix Lestrange.
Sirius Satellite Radio
Sirius Satellite Radio, also known as CD Radio, was one of the two licensed US satellite radio companies. It launched in 2002 and merged with XM in 2008 to form Sirius XM.
Sirius Symboli (シリウスシンボリ)
Sirius Symboli (シリウスシンボリ, 1982–2012) was a Japanese Thoroughbred who won the 1985 Japanese Derby by three lengths, then ran 14 winless races in Europe including the 1986 Arc, and later sired 120 winners.
Sirius the Jaeger
Sirius the Jaeger (天狼〈シリウス〉 Sirius the Jaeger, Tenrou) is a 2018 original 12-episode P.A. Works vampire-hunter anime set in 1930 Tokyo, directed by Masahiro Ando, starring werewolf Yuliy, streamed on Netflix 2018-2026.
Sirius Therapeutics (靖因药业)
Sirius Therapeutics (靖因药业, Jingyin Pharma) is a clinical-stage biotech developing siRNA therapies for coagulation, cardiometabolic disease, and obesity, co-founded in 2021 with dual headquarters in San Diego and Shanghai.
Sirius XM
Sirius XM is an American subscription audio entertainment company broadcasting music, sports, and talk channels by satellite and streaming, formed when Sirius and XM merged in 2008.
SIRIUS/CSI:FingerID
SIRIUS/CSI:FingerID is a software pair for identifying small molecules from tandem mass spectrometry data, developed by the University of Jena and hosted by Bright Giant.
Sirivadhanabhakdi family
The Sirivadhanabhakdi family is a Thai business dynasty founded by Charoen Sirivadhanabhakdi, whose TCC Group owns Thai Beverage, maker of Chang beer, and Fraser and Neave.
Sirivannavari
Sirivannavari (Princess Sirivannavari Nariratana Rajakanya, born 1987) is a daughter of King Vajiralongkorn of Thailand, founder of the SIRIVANNAVARI fashion house, WIPO Ambassador for Fashion and Design, SEA Games badminton and dressage medalist, and second in line to the throne.
Sirivennela (సిరివెన్నెల)
Sirivennela (సిరివెన్నెల) is a 1986 Telugu musical drama directed by K. Viswanath, starring Sarvadaman Banerjee as a blind flautist, with Suhasini and Moon Moon Sen; music by K. V. Mahadevan, lyricist debut of Sirivennela Seetharama Sastry, Nandi Award winner.
Sirivennela Seetharama Sastry (సిరివెన్నెల సీతారామశాస్త్రి)
Sirivennela Seetharama Sastry (సిరివెన్నెల సీతారామశాస్త్రి), born Chembolu Seetharama Sastry, was a Telugu film lyricist who wrote over 3,000 songs, won eleven Nandi Awards, three Filmfare Awards Telugu, and the 2019 Padma Shri.
Sīrjān
Sīrjān (سیرجان), city in Kerman province, southeastern Iran; medieval main town of Kerman on the Fars–Bam–Hormuz–Sistan roads. Old city (Shahre Qadim) later replaced by Qal'eh Sang, Bagh Bamid, and Qajar-era Sa'idabad, the present site.
Sirkka Norrlund
Sirkka Norrlund (Sirkka Marjatta Norrlund, 1943–2022) was a Finnish sprint hurdler from Vaasa, a 23-time Finnish champion, 1964 Olympian, 1969 European 100m hurdles finalist, and 1968 world record holder in the 200m hurdles (27.2).
Sirkka Polkunen
Sirkka Polkunen (Sirkka Tellervo Polkunen-Vilander, 1927-2014), Finnish cross-country skier; won the first Olympic women's 3x5 km relay gold at Cortina 1956 and relay silver at Falun 1954; fifth in the 10 km at Oslo 1952.
Sirmium (Сирмијум)
Sirmium (Сирмијум), Roman city under Sremska Mitrovica, Serbia; colony from 89 AD, imperial residence of Diocletian through Constantius II, capital of Pannonia Secunda, Hunnic conquest 441, destroyed by Avars 582.
Sirnaomics
Sirnaomics Ltd. is a clinical-stage RNAi therapeutics biopharmaceutical company founded by Patrick Lu in 2007 and headquartered in Gaithersburg, Maryland, listed on the Hong Kong Stock Exchange.
Sirocco
The sirocco, also called jugo on the Adriatic, is a hot, dusty wind from the Sahara that crosses the Mediterranean and brings humid, stormy weather to southern Europe.
Sirocco Tower
Sirocco Tower is a 145-metre S&S Worldwide shot-and-drop tower at Six Flags Qiddiya City, Saudi Arabia, opened 31 December 2025; the world's tallest free-standing shot tower, dropping riders at close to 130 km/h.
Siroheme biosynthesis
Siroheme biosynthesis: the three-step pathway from uroporphyrinogen III (SAM methylation, oxidation, iron insertion) making the cofactor of sulfite and nitrite reductases, via CysG, Met8p, or SirA/SirC/SirB.
Sirohi sword (सिरोही तलवार)
Sirohi sword (सिरोही तलवार), a slightly curved single-edged Indian talwar made in Sirohi, Rajasthan, famed as Maansahi steel; built as raw iron sandwiched between steel sheets, 27-31 inches long, still forged there today.
Široki Brijeg
Široki Brijeg, a city in West Herzegovina Canton, Bosnia and Herzegovina, on the Lištica river near Mostar; formerly Lise, Široki brig, and Lištica; about 29,000 municipal residents, Franciscan monastery founded 1846, developed economy, and NK Široki Brijeg football club.
Sirolimus
Sirolimus (rapamycin, Rapamune) is an mTOR-inhibitor immunosuppressant from Streptomyces hygroscopicus, discovered in Easter Island soil in the 1960s, approved by the FDA in 1999 for kidney transplant rejection prophylaxis and for lymphangioleiomyomatosis.
Sirona Dorsa
Sirona Dorsa is a 700-km-diameter ridge system (dorsum) on Venus at 43.5°S, 193.5°E, IAU-approved in 1997 and named for the Celtic sky goddess Sirona.