Search by letter: S
Search by letter
Search by letter: S
- Second Temple (Herod's Temple) — Jerusalem's central sanctuary, 516 BCE–70 CE Second Temple
- Second Triumvirate (Roman Republic, 43–33 BC) Second Triumvirate
- Second Vatican Council (Vatican II) Second Vatican Council
- Second Viennese School: Schoenberg, Berg, Webern and the Birth of Atonality Second Viennese School
- Second War of Scottish Independence
- Second-class citizen
- Second-in-Command (2IC): role, responsibilities and variations Second-in-command
- Second-wave feminism
- Secondary color (definition, models, and uses) Secondary color
- Secondary palate
- Secondary school
- Secondary sector (manufacturing and construction) Secondary sector
- Secondary sex characteristics: definition, examples, and significance Secondary sex characteristic
- Secondary source: definition, role, and distinctions Secondary source
- Secqueville-en-Bessin — former commune in Calvados, Normandy Secqueville-en-Bessin
- Secrecy: definition, types, protection and social implications Secrecy
- Secret (Madonna song)
- Secret ballot: the private method of voting and its history Secret ballot
- Secret Diary of a Call Girl (British TV series) Secret Diary of a Call Girl
- Secret Intelligence Service (MI6) Secret Intelligence Service
- Secret police: role, methods, and historical context Secret police
- Secret sharing: threshold schemes, variants, and practical uses Secret sharing
- Secret society
- Secretariat: Role, Structure, and Examples in Organizations Secretariat
- Secretariat: 1973 Triple Crown champion Thoroughbred racehorse Secretariat (horse)
- Secretary: role, duties, history and modern developments Secretary
- Secretary General of NATO
- Secretary General of the Organization of American States
- Secretary of State: roles, variations, and historical background Secretary of State
- Secretary of State for Business, Energy and Industrial Strategy
- Secretary of State for Digital, Culture, Media and Sport (UK) Secretary of State for Digital, Culture, Media and Sport
- Secretary of State for Exiting the European Union (Brexit Secretary) Secretary of State for Exiting the European Union
- Secretary of State for Transport (United Kingdom) Secretary of State for Transport
- Secretary of State of California
- Secretary of State of Kansas one of the constitutional officers
- Secretarybird (Sagittarius serpentarius): an African terrestrial raptor Secretarybird
- Secretin: physiology, history, and clinical significance Secretin
- Secretion (biological process) Secretion
- Secrets of the Furious Five (animated short) Secrets of the Furious Five
- Sect (religious and political groups) Sect
- Section sign (§): typographic symbol used in legal citations and texts Section sign
- Section.80 — Kendrick Lamar's 2011 breakthrough album Section.80
- Sector model (Hoyt's urban land‑use model) Sector model
- Secu (commune in Dolj County, Romania) Secu
- Secular Coalition for America
- Secular humanism: principles, history, and public significance Secular humanism
- Secular state — government neutrality toward religion Secular state
- Secularism (secularity) — separation of religion and public authority Secularism
- Secularization: decline and transformation of religion in modern societies Secularization
- Secunderabad: overview, history, and civic importance Secunderabad
- Secure channel (cryptography) Secure channel
- Secure Copy (SCP): Encrypted file transfer using SSH Secure copy
- Secure Digital (SD) card: overview, types, speeds and compatibility Secure Digital card
- Secure Shell (SSH): secure remote login and data-transfer protocol Secure Shell
- Securitas depot robbery (Tonbridge, 2006) Securitas depot robbery
- Security: concepts, types, history, and practical measures Security
- Security clearance: purpose, levels, process, and significance Security clearance
- Security interest: secured loans, collateral, and creditor rights Security interest
- Security-Enhanced Linux (SELinux): mandatory access control for Linux systems Security-Enhanced Linux
- Seda, Latvia — peat town in Vidzeme Seda, Latvia
- Sedalia, Missouri
- Sedan (automobile and historical meanings) Sedan
- Sedan (Ardennes) — town, fortress and administrative centre in northeastern France Sedan, Ardennes
- Sedan, Kansas
- Sedative: uses, types, risks, and management Sedative
- Sedbergh: market town in South Lakeland, Cumbria Sedbergh
- Sedeh (Sehdeh) — city in Eqlid County, Fars Province, Iran Sedeh
- Sédeilles — former municipality in the canton of Vaud, Switzerland Sédeilles
- Sedevacantism
- Sedgefield, County Durham Sedgefield
- Sedgwick County, Colorado
- Sedgwick County, Kansas
- Sedgwick, Arkansas
- Sedilo, Sardinia Sedilo
- Sediment: deposition, composition and geological significance Sediment
- Sedimentary rock
- Sedimentology: study of sediments, processes, environments, and applications Sedimentology
- Sedinam Moyowasifza-Curry (SKCM Curry) — American Green Party activist and candidate Sedinam Moyowasifza-Curry
- Sedini (Sèddini), comune in the Province of Sassari, Sardinia Sedini
- Sedition: legal meaning, history, and contemporary issues Sedition
- Sedona, Arizona: Red Rock Scenery, Arts, and Recreation Sedona, Arizona
- Sedze-Maubecq
- Sedzère — a commune in Pyrénées-Atlantiques, southwestern France Sedzère
- See District (Lac District), Canton of Fribourg, Switzerland See District, Fribourg
- See You Again (Miley Cyrus and Wiz Khalifa songs) See You Again
- See You Again — Wiz Khalifa featuring Charlie Puth See You Again (Wiz Khalifa song)
- See-Gaster — district in the canton of St. Gallen, Switzerland See-Gaster
- Seebach (Zürich): overview, history and local features Seebach (Zürich)
- Seeberg (Bern) — Municipality in Oberaargau, Switzerland Seeberg
- Seed (botany): structure, germination, and ecological importance Seed
- Seed dispersal: mechanisms, history, and ecological importance Seed dispersal
- Seed fern (Pteridospermatophyta): extinct seed-bearing plants with fern-like foliage Seed fern
- Seed of Chucky
- Seed plants (Spermatophytes): overview, structure, classification, and history Seed plants
- Seedling: the early stage of a plant's life Seedling
- Seedorf (Bern) — municipality in the Seeland district Seedorf, Bern
- Seedorf (Uri) — municipality in central Switzerland Seedorf, Uri
- Seegräben — small municipality in the Hinwil district, canton of Zürich Seegräben
- Seeheim-Jugenheim — municipality in Hesse, Germany Seeheim-Jugenheim
- Seehof, Switzerland
- Seeland (administrative district, Canton of Bern) Seeland (administrative district)
- Seelisberg: Swiss mountain village in the canton of Uri Seelisberg
- Seema Malhotra: British Labour and Co-operative Party MP for Feltham and Heston Seema Malhotra
- Seema Verma
- Seen (Winterthur): district profile and history Seen (Winterthur)
- Seengen — municipality in Aargau by Lake Hallwil, Switzerland Seengen
- Seer Gharbi (Union Council of Abbottabad District) Seer Gharbi
- Seer Sharqi Bhattian: Union Council in Abbottabad District Seer Sharqi Bhattian
- Seesaw (teeter-totter): playground lever, mechanics, and safety Seesaw
- Seether
- Seewen (Dorneck, Solothurn) — municipality and local features Seewen
- Seewis im Prättigau — municipality in Graubünden, Switzerland Seewis im Prättigau
- Seftigen — municipality in the administrative district of Thun, canton of Bern Seftigen
- Seftigen District — overview, organization, and significance Seftigen District
- Sega: history, major franchises, and influence in video games Sega
- Sega CD (Mega‑CD): CD-ROM Add‑On for the Sega Genesis Sega CD
- Sega Genesis (Mega Drive): 16‑bit home console and its legacy Sega Genesis
- Sega Saturn
- Sega Technical Institute (STI) Sega Technical Institute
- Segarcea — town in Dolj County, Romania Segarcea
- Segariu — town and comune in Sud Sardegna, Sardinia, Italy Segariu
- Segeberg (district) — Kreis in Schleswig-Holstein, Germany Segeberg
- Segisaurus
- Segmentation in Biology Segmentation
- Segnosaurus: the slow-lizard therizinosaur of the Late Cretaceous Segnosaurus
- Ségny — commune in Ain, Auvergne-Rhône-Alpes, France Ségny
- Ségolène Royal — French politician and former presidential candidate Ségolène Royal
- Ségou Region
- Segovia — historic city in Castile and León, Spain Segovia
- Segregation: forms, causes, history, and social effects Segregation
- Ségrie — commune in Sarthe, Pays de la Loire, France Ségrie
- Seguin, Texas: history, features, and local life Seguin, Texas
- Segun Bucknor: Nigerian musician and journalist (1946–2017) Segun Bucknor
- Segunda División (Spain's second-tier football league) Segunda División
- Segunda División B (Spain) Segunda División B
- Segunda División de México
- Segura (river) Segura
- Séguret — hilltop commune in Vaucluse, Provence-Alpes-Côte d'Azur Séguret
- Sehnsa — town and sub-district in Azad Kashmir Sehnsa
- Sehore district, Madhya Pradesh Sehore district
- Sehwan Sharif Tehsil
- Sei Shōnagon — Heian court writer and author of The Pillow Book Sei Shōnagon
- Sei whale
- Seibersdorf: Austrian village and international research site Seibersdorf
- Seiðr — Old Norse ritual sorcery, prophecy and social role Seiðr
- Seignalens — small commune in Aude, Occitanie Seignalens
- Seignelay — commune in Yonne, Bourgogne-Franche-Comté, France Seignelay
- Seigneur: medieval French lord and the seigneurie (feudal lordship) Seigneur
- Seigneux — former municipality in the canton of Vaud, Switzerland Seigneux
- Seigo Narazaki — Japanese goalkeeper and longtime Nagoya Grampus stalwart Seigo Narazaki
- Seigo Shimokawa (Japanese footballer) Seigo Shimokawa
- Seiichi Makita — Japanese football player (born 1968) Seiichi Makita
- Seiichi Sakiya
- Seiichiro Maki
- Seiji Honda (Japanese association football player, born 1976) Seiji Honda
- Seiji Kubo — Japanese former football player (born 1973) Seiji Kubo
- Seiji Ozawa — Japanese conductor and longtime Boston Symphony music director Seiji Ozawa
- Seijun Suzuki: Japanese director of bold, surreal yakuza cinema Seijun Suzuki
- Seikan Tunnel: Japan’s Undersea Railway Link Between Honshu and Hokkaido Seikan Tunnel
- Seiko: Japanese watchmaker and technology company Seiko
- Seiko Matsuda
- Seiko Yamanaka
- Seiling, Oklahoma
- Seillonnaz — commune in Ain, Auvergne-Rhône-Alpes, France Seillonnaz
- Seinäjoki: City of Southern Ostrobothnia, Finland Seinäjoki
- Seine — major river of northwestern France Seine
- Seine-et-Marne
- Seine-Maritime — department in Normandy, France Seine-Maritime
- Seine-Saint-Denis (French department) Seine-Saint-Denis
- Seinen manga: Japanese comics for adult male readers Seinen manga
- Seinfeld — American sitcom (1989–1998) Seinfeld
- Seiry — village and former municipality in Fribourg, Switzerland Seiry
- Seishiro Shimatani
- Seismic analysis: methods, history, and applications in earthquake engineering Seismic analysis
- Seismic load: definition, types, assessment, and design considerations Seismic load
- Seismic performance of buildings and structures Seismic performance
- Seismic retrofit: strengthening existing structures against earthquakes Seismic retrofit
- Seismic wave
- Seismogram: recorded traces of ground motion Seismogram
- Seismology: the study of Earth's vibrations and internal structure Seismology
- Seismometer
- Seitaro Tomisawa
- Seitingen-Oberflacht: Municipality in Tuttlingen District, Baden-Württemberg, Germany Seitingen-Oberflacht
- Seiya Fujita — Japanese association football player Seiya Fujita
- Seizure (Neurological Event): Causes, Types, Symptoms, Diagnosis, and Care Seizure
- Sejanus: Praetorian Prefect and Power Behind Tiberius Sejanus
- Sejm of the Republic of Poland Sejm
- Sejo of Joseon
- Sejong the Great (1397–1450) Sejong the Great
- Sekhmet: Egyptian lioness goddess of war, healing, and the sun Sekhmet
- Seki Matsunaga (1928–2013) — Japanese footballer Seki Matsunaga
- Sekihan — Japanese celebratory red rice Sekihan
- Sekkizhar — 12th-century Tamil poet and author of the Periya Puranam Sekkizhar
- Sela Ward — American actress and Emmy- and Golden Globe-winning performer Sela Ward
- Selah, Washington
- Selangor: Malaysian state and economic hub Selangor
- Selawik, Alaska
- Selby, North Yorkshire Selby
- Selby Abbey
- Selçuk İnan — Turkish midfield playmaker and set-piece specialist Selçuk İnan
- Seldovia, Alaska: Coastal Harbor Community on the Kenai Peninsula Seldovia, Alaska
- Selectable marker (molecular biology) Selectable marker
- Selection sort
- Selective serotonin reuptake inhibitor (SSRI): overview, uses, and effects Selective serotonin reuptake inhibitor
- Selective Service System (United States) Selective Service System
- Selectivity
- Selectivity (electrical protection) Selectivity (electronic)
- Selegas (Sèligas) — town and comune in Sud Sardegna, Sardinia Selegas
- Séléka: rebel coalition and its role in the Central African Republic conflict Séléka
- Selena Quintanilla-Pérez: Life, Music, and Cultural Legacy Selena
- Selena ¡VIVE! — 2005 Tribute Concert and Cultural Milestone Selena ¡VIVE!
- Selena (1989 studio album) Selena (album)
- Selena (1997 film) Selena (movie)
- Selena: albums discography and release history Selena albums discography
- Selena Etc.: Clothing boutiques founded by singer Selena Selena Etc.
- Selena Forever (stage musical) Selena Forever
- Selena Gomez
- Selena Live! — Grammy-winning 1993 live album by Selena Selena Live!
- Selena Live: The Last Concert — recording, significance, and legacy Selena Live! The Last Concert
- Selena singles: Complete discography and chart history Selena singles discography
- Selena: videography and video releases Selena videography
- Selena y Los Dinos
- Selena y Los Dinos — debut album (1984) Selena y Los Dinos (album)
- Selenate (SeO4^2−) Selenate
- Selene — Greek goddess and personification of the Moon Selene
- Selenic acid (H2SeO4) Selenic acid
- Selenide (the Se2− ion and its compounds) Selenide
- Selenite (SeO3²⁻): the selenite ion and its chemistry Selenite
- Selenium — properties, uses, biological role and history Selenium
- Selenium dioxide (SeO2) Selenium dioxide
- Selenium disulfide
- Selenium hexafluoride (SeF6) Selenium hexafluoride
- Selenium monochloride (Se2Cl2): properties, structure, synthesis, uses Selenium monochloride
- Selenium tetrachloride (SeCl4) Selenium tetrachloride
- Selenium tetrafluoride (SeF4) Selenium tetrafluoride
- Selenium trioxide (selenium(VI) oxide), SeO3 Selenium trioxide
- Selenocysteine
- Selenous acid (H2SeO3): properties, preparation, uses, and safety Selenous acid
- Selens — a small commune in Aisne, northern France Selens
- Sélestat — town in Bas-Rhin, Alsace (France) Sélestat
- Seleucid Empire: Hellenistic realm across the Near East Seleucid Empire
- Seleucus I Nicator — founder of the Seleucid realm Seleucus I Nicator
- Seleute — former municipality in the canton of Jura, Switzerland Seleute
- Self (identity and consciousness) Self
- Self Esteem (song by The Offspring) Self Esteem
- Self storage (self‑storage): overview, uses and industry Self storage
- Self-cannibalism (autosarcophagy or autocannibalism) Self-cannibalism
- Self-defence: principles, methods, and legal limits Self-defence
- Self-denial: meaning, forms, history, and implications Self-denial
- Self-determination (right of peoples to choose their political status) Self-determination
- Self-driving car
- Self‑esteem: definitions, causes, effects and ways to support healthy self‑regard Self-esteem
- Self-fulfilling prophecy
- Self-help book: overview, characteristics, history, and uses Self-help book
- Self-injury (self-harm): causes, forms, and responses Self-injury
- Self-organization: spontaneous order in natural and artificial systems Self-organization
- Self-portrait: history, forms, and notable examples Self-portrait
- Self-replication: biological, molecular, digital and cultural processes Self-replication
- Self-similarity
- Self-Strengthening Movement (Qing dynasty reform, 1861–1895) Self-Strengthening Movement
- Selfie — definition, history, types, and cultural impact Selfie
- Selfish DNA: noncoding sequences that propagate within genomes Selfish DNA
- Selfishness: definitions, causes, debates and distinctions Selfishness
- Selhurst Park: Crystal Palace Football Stadium in Croydon Selhurst Park
- Selhurst railway station, South London Selhurst railway station
- Seligenstadt, Hesse, Germany Seligenstadt
- Seligman, Arizona: Historic Route 66 Community and Tourist Stop Seligman, Arizona
- Selim Hoss
- Selimiye Mosque — Ottoman imperial mosque in Edirne Selimiye Mosque
- Seljuk architecture: forms, development and regional variations Seljuk architecture
- Seljuk dynasty: origins, empire, culture and legacy Seljuk dynasty
- Seljuk Empire — Medieval Turkic-Persian State (11th–12th centuries) Seljuk Empire
- Selkingen: Swiss alpine village and former municipality Selkingen
- Selkirk, Manitoba
- Selkirk, New York
- Selkirkshire: history, geography and cultural identity of a Scottish Borders county Selkirkshire
- Sell (verb): meaning, practice and examples Sell
- Sellapan Ramanathan (S. R. Nathan) Sellapan Ramanathan
- Selles (Pas-de-Calais): a rural commune in northern France Selles, Pas-de-Calais
- Selling out: compromise of principles for profit or popularity Selling out
- Selma (2014 film) Selma (movie)
- Selma Barkham: Maritime Historian and Discoverer of Red Bay Selma Barkham
- Selma Blair
- Selma Engel-Wijnberg: Sobibor escapee and Holocaust survivor Selma Engel-Wijnberg
- Selma Lagerlöf (1858–1940): Swedish novelist, storyteller and Nobel laureate Selma Lagerlöf
- Selma Reis: Brazilian singer and television actress Selma Reis
- Selma to Montgomery marches (1965) Selma to Montgomery marches
- Selma, Alabama — history, geography, and civil rights legacy Selma, Alabama
- Selma, California
- Selma, Oregon: small unincorporated community in Josephine County Selma, Oregon
- Selma, Switzerland — former mountain municipality in the Calanca valley Selma, Switzerland
- Selman Waksman: pioneer of antibiotic discovery and soil microbiology Selman Waksman
- Selous' zebra (Equus quagga borensis) Selous' zebra
- Selsey — seaside town on the Manhood Peninsula, West Sussex Selsey
- Selsun Blue — medicated dandruff shampoo brand Selsun Blue
- Seltisberg — municipality near Liestal in Canton Basel-Landschaft Seltisberg
- Selwyn College, Cambridge — history, architecture, student life and alumni Selwyn College, Cambridge
- Selzach (municipality, Canton of Solothurn) Selzach
- Selzthal (Styria, Austria) Selzthal
- Semantic Web: Principles, Core Technologies, and Practical Uses Semantic Web