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Sikorsky S-76
The Sikorsky S-76, briefly named Spirit, is a twin-engine commercial helicopter built by Sikorsky Aircraft; first flown in 1977, it serves offshore oil, airline, and executive roles.
Sikorsky S-92
The Sikorsky S-92, or S-92 Helibus, is a twin-engine heavy helicopter built by Sikorsky Aircraft that carries up to 19 passengers and first flew in 1998.
Sikorsky S-97 Raider
The Sikorsky S-97 Raider is an American light tactical prototype helicopter built by Sikorsky, using coaxial rotors and a pusher propeller to exceed 200 knots, first flown in 2015.
Sikorsky SH-3 Sea King
The Sikorsky SH-3 Sea King (S-61, H-3 Sea King) is an American twin-engine amphibious anti-submarine helicopter that served as the US Navy's carrier-based submarine hunter from 1961 to 1996.
Sikorsky SH-60 Seahawk
The Sikorsky SH-60 Seahawk is a twin-engine, shipboard multi-mission helicopter developed for the United States Navy from the Army's UH-60 Black Hawk, entering service in 1984.
Sikorsky UH-60 Black Hawk
The Sikorsky UH-60 Black Hawk is a twin-engine utility helicopter, selected by the United States Army in 1976, that has served as its primary medium-lift tactical transport since 1979.
Sikorsky X2
The Sikorsky X2 was an experimental compound helicopter built by Sikorsky Aircraft, using coaxial rotors and a pusher propeller to reach 250 knots in 2010.
Sikorsky–Boeing SB-1 Defiant
The Sikorsky–Boeing SB-1 Defiant is an American high-speed compound helicopter demonstrator, first flown in 2019, that used coaxial rotors and a pusher propulsor to reach 247 knots.
Sikrai Mound
Sikrai Mound (Ancient Mound, Sikrai) is a 10 m archaeological settlement mound at Sikri, Dausa district, Rajasthan, on the Banganga river, yielding late-historical dull red ware; a centrally protected ASI Jaipur Circle monument notified in 1951.
Siksaup Dorsa
Siksaup Dorsa is a 650-km-wide ridge system (dorsum) on Venus at 73S, 228E, named in 1997 for Siksaup, a Kachin sun goddess of Burma/Myanmar; one of Venus's sky-goddess-named dorsa.
SikTh
SikTh are an English progressive metal band formed in Watford, Hertfordshire in 1999, known for dual vocalists and cited as a key influence on djent.
Siku Njema
Siku Njema, Swahili for "A Good Day," is a 1996 Swahili novel by the Kenyan writer Ken Walibora and his first, serving as a Kenyan secondary-school set book.
Siku Quanshu
The Siku Quanshu (四库全书， Complete Library of the Four Treasuries) is the largest book collection of the Qing dynasty, compiled from 1772 to 1787 under the Qianlong emperor.
Siku Quanshu Compilation Bureau
The Siku Quanshu Compilation Bureau (四库全书馆) was the office the Qianlong Emperor set up in 1773 to compile the Siku Quanshu, with Ji Yun as chief compiler.
Siku ya Watenzi
Siku ya Watenzi, also published as Siku ya Watenzi Wote, is a Swahili-language novel by the Tanzanian writer Shaaban Robert, written before Tanganyikan independence and published after his death.
Sikun Labyrinthus
Sikun Labyrinthus is a 175 km karst-like labyrinth terrain near Titan's south pole (77.9S, 28.9W), IAU-named in 2010 after a Dune planet, shaped by methane dissolving organic material.
Sil-Bel
Sil-Bel, also known as Silibel or Sillibel, was a king of Gaza who stayed loyal to Assyria from Sennacherib's 701 BC campaign into Ashurbanipal's reign.
Sila (archaeological site)
Sila (Al Sila') is an archaeological site on the coast of Abu Dhabi emirate, United Arab Emirates, where flint arrowheads about 7,000 years old indicate Neolithic occupation.
Sila Biosphere Reserve
Sila Biosphere Reserve, a UNESCO MAB reserve in Calabria, Italy, designated 14 June 2014 as the 10th Italian biosphere reserve; includes Sila National Park, about 1,700 km², endemic black pine forests and roughly 1,000 vascular plants.
Sila Nanotechnologies
Sila Nanotechnologies, or Sila, is an American battery materials company in Alameda, California, founded in 2011, whose Titan Silicon anode material raises energy density about 20 percent.
Sila Nerangalil Sila Manithargal
Sila Nerangalil Sila Manithargal is a 1970 Tamil novel by the Indian writer D. Jayakanthan that expands his controversial short story Agnipravesam and won the Sahitya Akademi Award for 1972.
Sila-substitution
Sila-substitution, also called the silicon switch, is a medicinal chemistry method that replaces carbon atoms in drug candidates with silicon to alter activity and metabolism.
Śīlabhadra
Śīlabhadra (शीलभद्र), c. 529–645, was an Indian Yogācāra Buddhist dialectician, a Brahmin from Samatata who headed Nālandā's monastery, succeeded Dharmapāla, and taught Xuanzang for five years.
SILAC
SILAC (stable isotope labeling by amino acids in cell culture) is a metabolic labeling method for quantitative mass spectrometry proteomics, reported by Shao-En Ong and colleagues in 2002.
Silafluofen
Silafluofen (シラフルオフェン) is an organosilicon pyrethroid insecticide invented in Japan in 1984, used against termites and rice pests and distinguished by its unusually low toxicity to fish.
Silage
Silage: anaerobically fermented, acid-preserved high-moisture forage (corn, sorghum, grass, legume) fed to ruminants; pH drops to 3.8–5 via lactic acid; distinct from hay; additives include LAB inoculants like Lactobacillus buchneri.
Silage fermentation
Silage fermentation is an agricultural preservation method in which chopped forage is stored without air and fermented by lactic acid bacteria into stable moist livestock feed.
Silakala
Silakala, also known as Ambasamanera-Silakala, was a 6th-century king of Anuradhapura in Sri Lanka who ruled for thirteen years after rebelling against King Upatissa II.
Silamaka and Poullori
Silamaka and Poullori is a West African epic cycle, told in Fula and Bambara, about two Fula heroes who resisted the Bambara kingdom of Ségou.
Silambarasan
Silambarasan Thesingu Rajendar (Simbu, STR), Tamil film actor, director, singer, and composer born 1983 in Chennai to T. Rajendar; child star nicknamed Little Superstar, lead debut Kadhal Azhivathillai (2002), SIIMA-winning Maanaadu, and currently filming Vetri Maaran's Arasan.