All articles starting with S

Scientology and celebrities

Scientology and celebrities covers the Church of Scientology's recruitment of famous entertainers, begun with L. Ron Hubbard's 1955 Project Celebrity, and its Celebrity Centre churches.

Scientology beliefs and practices

Scientology beliefs and practices teach that each person is an immortal spiritual being, a thetan, freed of mental blocks through auditing along the Bridge to Total Freedom.

Scientology speedrunning (Scientology run): a 2026 TikTok trend started by @5.0arrodo and popularized by Swhileyy, in which teens film themselves rushing into Church of Scientology buildings to see how far inside they can get before removal, spreading from Hollywood to the UK, Australia, and Canada.

SciFinder

SciFinder is a subscription research platform from the Chemical Abstracts Service, launched as a desktop application in 1995 and web-based since 2008, giving chemists access to curated substance, reaction, reference, and patent data.

scikit-image

scikit-image (imported as skimage) is an open-source Python collection of image-processing algorithms that operate directly on NumPy arrays, used in microscopy, astronomy, and other scientific imaging fields.

Scikit-learn

Scikit-learn, also known as Sklearn, is an open source Python machine learning library built on SciPy, started as a 2007 Google Summer of Code project and first released in 2010.

Scilab

Scilab is a free and open-source platform for numerical computation, providing a high-level interpreted programming language, hundreds of mathematical functions, 2-D and 3-D graphics, and the Xcos graphical modeler and simulator.

Scilex Holding Company

Scilex Holding Company is a Palo Alto, California-based biopharmaceutical company focused on non-opioid pain management, selling ZTlido, ELYXYB, and GLOPERBA and trading on Nasdaq as SCLX.

Scilliroside

Scilliroside (CAS 507-60-8), a bufadienolide glycoside from red squill (Urginea maritima), is an emetic, cardiotoxic rodenticide used since the 13th century; rodents, unable to vomit, die of glycoside intoxication.

SCImago Journal Rank

SCImago Journal Rank (SJR) is a free, PageRank-style journal metric from the SCImago Research Group that weights citations by citing-journal prestige over a three-year window using Scopus data, assigns Q1-Q4 quartiles per subject category, and differs from the JIF, CiteScore, and SNIP in weighting and data source.

Scimitar

A scimitar is a curved, single-edged sword of the Middle East, Central Asia, and South Asia, first carried by Turko-Mongol nomads in the 7th century.

Scimitar oryx

The scimitar oryx, also called the scimitar-horned oryx (Oryx dammah), is a Sahara antelope, declared extinct in the wild in 2000 and reintroduced in Chad.

Scimitar syndrome

Scimitar syndrome: rare congenital anomaly with right pulmonary venous drainage into the inferior vena cava, right lung hypoplasia, and systemic arterial supply; named by Neill in 1960; survival 88% at age 30.

Scinax

Scinax (snouted treefrogs), genus Wagler 1830 of hylid treefrogs, 78-83 species from Mexico to Argentina; type species Hyla aurata; molecular 16S taxonomy reveals cryptic and undescribed Amazonian species.

Scincella

Scincella (ground skinks, smooth skinks), genus of small lygosomine skinks (Scincidae) established by Mittleman, 1950; type species Scincus lateralis; about 60 species across Asia and the Americas, diagnosed by a transparent lower-eyelid window.

Scincidae

Scincidae (skinks), family of lizards within Squamata; about 1,700 species, one-quarter of all lizards, worldwide except Antarctica; extreme morphological lability with repeated limb loss, live birth, and green blood; classification contested between four subfamilies and a proposed seven-family scheme.

Scincus

Scincus, the sandfish skinks, a genus of five skink species of Saharan and Arabian deserts that swim through loose sand using a sinusoidal body wave, hunt by sensing prey vibrations, and include the sandfish skink Scincus scincus.

Sep 23, 2026

Scindia army of Gwalior

The Scindia army of Gwalior (سندھیا فوج) was the regular army of the Scindia dynasty of Gwalior, rebuilt in the late eighteenth century by Mahadji Scindia on European lines.

Sep 23, 2026

Scindia dynasty of Gwalior

The Scindia dynasty of Gwalior (शिंदे) was a Maratha ruling house founded by Ranoji Sindhia in 1726, which built a north Indian empire under Mahadji Sindhia.

Scingomagus

Scingomagus (Scincomagus, Excingomagus), an ancient Roman road station in the Cottian Alps identified with Exilles in the Susa valley, Italy, between Ocelum and Eburodunum, known from Pliny NH 2.244 and the Alpine itineraries.

Scintigraphy

Scintigraphy, also known as a gamma scan or scintigram, is a nuclear medicine imaging technique in which a radioactive tracer shows organ function, such as kidney drainage or thyroid activity.

Scintil Photonics

Scintil Photonics is a French fabless silicon photonics startup founded in 2018 in Grenoble as a CEA-Leti spin-off, making laser sources for AI data centers.

Scintillating fiber

Scintillating fiber is an optical fiber made of scintillator that emits light when radiation passes through, guiding it to a photodetector for particle tracking and medical dosimetry.

Scintillating scotoma

Scintillating scotoma, also called fortification spectrum or teichopsia, is the most common migraine visual aura: a flickering, jagged-edged blind spot spreading C-shaped over 5–60 minutes, linked to cortical spreading depression.

Scintillation (physics)

Scintillation is the emission of flashes of light by a material when ionizing radiation deposits energy in it, first observed by Wilhelm Röntgen in 1895.

Scintillation counter

A scintillation counter is a radiation detector in which ionizing radiation makes a scintillator emit light flashes that a photodetector converts into electrical pulses counted by energy.

Sep 29, 2026

Scintillation proximity assay

Scintillation proximity assay (SPA) is a bead-based radioisotope assay in which a radiolabeled ligand emits light only when bound near a scintillant bead, requiring no separation step.

Scintillator

A scintillator is a material that absorbs ionizing radiation and re-emits it as light flashes; coupled to a light sensor, it forms a scintillation detector.

Scintillometer

A scintillometer is an optical or microwave instrument that measures atmospheric turbulence along paths of tens of meters to several kilometers to derive surface heat fluxes.