All articles starting with S

Stereodivergent synthesis

Stereodivergent synthesis is a strategy in asymmetric catalysis in which identical starting materials yield different stereoisomers of a product by changing catalysts or reaction conditions.

Stereodynamics, also called dynamical stereochemistry, is the branch of molecular reaction dynamics studying how reactive and inelastic scattering outcomes depend on the polarization, or spatial orientation, of reactants.

Stereoelectroencephalography

Stereoelectroencephalography (SEEG) is an invasive neurophysiological technique in which depth electrodes are implanted in the brain to locate seizures in drug-resistant focal epilepsy, developed in Paris in the 1950s.

Stereoelectronic effect

A stereoelectronic effect is an effect on a molecule's structure, reactivity, or properties caused by the spatial alignment of its orbitals, encompassing the gauche, anomeric, and hyperconjugative effects.

Oct 22, 2026

Stereograph

A stereograph is a card bearing two nearly identical photographs that fuse into a single three-dimensional image when viewed through a stereoscope, popular from 1870 to 1920.

Stereographic projection

Stereographic projection is a way of mapping a sphere onto a plane by projecting from a pole; it preserves angles and maps circles to circles or lines.

Stereoisomerism

Stereoisomerism, also called spatial isomerism, is isomerism where molecules have identical connectivity but differ in the spatial arrangement of their atoms, giving enantiomers, diastereomers, and cis–trans isomers.

Stereolab

Stereolab are a London-formed avant-pop band founded in 1991 by Tim Gane and Laetitia Sadier, fusing 1960s pop, Krautrock, and lounge music; albums include Peng! (1992), Dots and Loops (1997), and Instant Holograms on Metal Film (2025).

Stereolabs

Stereolabs (Stereolabs SAS) is a French-founded maker of stereo vision depth cameras and AI software, best known for its ZED cameras and ZED SDK, acquired by Ouster in 2026.

Stereolabs ZED

The Stereolabs ZED is a family of stereo depth cameras by Stereolabs, a San Francisco and Paris company, that computes depth from two offset camera views using the ZED SDK.

Stereolithography

Stereolithography (SLA) is a 3D printing process that cures liquid resin layer by layer with light, invented by Charles Hull and first commercialized in 1986.

Stereology

Stereology is a set of mathematical sampling methods that estimate three-dimensional properties of solid materials and tissues, such as volume, surface area, and cell number, from two-dimensional microscopic sections.

Stereophonic (play)

Stereophonic, David Adjmi's Tony-winning play with music about a 1970s rock band recording an album, directed by Daniel Aukin with songs by Will Butler; most Tony-nominated play ever, five 2024 Tony wins including Best Play.

Stereophonic sound

Stereophonic sound, or stereo, is sound reproduction through two or more channels so it seems to come from distinct locations, invented by Alan Blumlein in 1931.

Stereophonics

Stereophonics, Welsh rock band formed 1992 in Cwmaman, Cynon Valley, by Kelly Jones, Richard Jones and Stuart Cable; formerly Tragic Love Company. Nine UK number-one albums, the single Dakota at number one, and the 2025 thirteenth album Make 'em Laugh, Make 'em Cry, Make 'em Wait.

Stereophotogrammetry

Stereophotogrammetry reconstructs 3D surface geometry from pairs of overlapping photographs taken from two camera positions, producing point clouds and digital elevation models used to measure terrain, glaciers, ocean waves, and clouds.

Sep 19, 2026

Stereopony

Stereopony (ステレオポニー) was a three-piece Japanese pop-rock band from Okinawa, formed in 2007, known for anime tie-in singles like 'Hitohira no Hanabira', and dissolved in 2012.

Stereopsis

Stereopsis (stereoscopic vision) is depth perception from binocular disparity, discovered by Wheatstone in 1838. Distinguished from monocular depth cues; measured clinically by stereoacuity tests such as Titmus, Randot, TNO, Frisby.

Stereoscope

A stereoscope is an optical instrument that shows a separate image to each eye, creating an illusion of depth, invented by Charles Wheatstone in 1838.

Stereoscopy

Stereoscopy, also called stereoscopic 3D, creates depth perception by showing slightly different images to each eye, fusing them via stereopsis; invented with Wheatstone's 1838 stereoscope, it spans anaglyph, polarized, and shutter-glass displays, 3-D cinema, and medical stereo endoscopy.

Stereoselective olefin metathesis

Stereoselective olefin metathesis is the control of alkene E/Z geometry in metathesis reactions, achieved with Z-selective molybdenum MAP and ruthenium catalysts introduced from 2009, plus stereoretentive ruthenium dithiolate catalysts reported in 2013.

Stereoselective synthesis

Stereoselective synthesis is a chemical reaction or sequence in which new elements of chirality form and stereoisomeric products arise in unequal amounts, measured as enantiomeric excess.

Stereoselectivity

Stereoselectivity is the preferential formation of one stereoisomer over another in a chemical reaction, called enantioselectivity or diastereoselectivity depending on the products, and central to pharmaceutical and natural product synthesis.

Oct 22, 2026

Stereospecific cross-coupling

Stereospecific cross-coupling is a metal-catalyzed carbon–carbon bond-forming reaction in which an enantioenriched substrate's stereochemistry is transferred predictably to the product, typically with retention or inversion of configuration.

Stereospecificity

Stereospecificity is the property of a reaction mechanism by which reactants differing only in configuration are converted into stereoisomeric products, as in SN2 inversion; unlike stereoselectivity, it describes the mechanism itself.

Stereotactic biopsy

Stereotactic biopsy is a minimally invasive neurosurgical procedure that uses three-dimensional imaging coordinates to guide a needle to deep brain lesions, achieving diagnostic yields above 95%.

Stereotactic body radiation therapy

Stereotactic body radiation therapy (SBRT), also called stereotactic ablative body radiotherapy (SABR), delivers high ablative radiation doses to body tumors in 1 to 5 fractions with submillimeter accuracy.

Stereotactic surgery

Stereotactic surgery: 3D coordinate-guided minimally invasive brain surgery, also called stereotaxis. Frame-based or frameless targeting for biopsy, functional neurosurgery, and radiosurgery; pioneered by Horsley-Clarke (1908) and Spiegel-Wycis (1947).

Stereotaxis

Stereotaxis is the robotic magnetic navigation technology of Stereotaxis, Inc., a St. Louis, Missouri company whose systems steer magnetically tipped catheters inside the heart under remote physician control.