All articles starting with S

Subathon

Subathon: subscription plus marathon, a livestream whose countdown timer is extended by subs, Bits, or donations. Popularized by Ludwig's 31-day 2021 run (282,191 subs); Emilycc's ran 550+ days.

Subatomic particle

A subatomic particle, also called a subnuclear particle, is any particle smaller than an atom, including electrons, quarks, protons, and the 17 fundamental particles of the Standard Model.

Subba Oil Field

Subba Oil Field (صبة, also written Saba or Suba) is an oil field in Dhi Qar province, southern Iraq, with reserves estimated at over a billion barrels.

Subbaiah Venkata Malladi is an Indian-born American mechanical engineer, Chief Technical Officer at the consulting firm Exponent in Menlo Park, California, elected to the National Academy of Engineering in 2025.

Oct 22, 2026

Subbanna

Subbanna is a Kannada novelette by Masti Venkatesha Iyengar, published under his pen name Srinivasa, about a poor Mysore musician whose life of loss ends in liberation through music.

Oct 10, 2026

Subbayya Sivasankaranarayana Pillai

Subbayya Sivasankaranarayana Pillai (1901–1950) was an Indian number theorist who made decisive contributions to Waring's problem and formulated Pillai's conjecture, an open problem on gaps between perfect powers.

Subbiah Ramalingam

Subbiah Ramalingam (1935–2019) was an Indian-born American mechanical engineer and emeritus professor at the University of Minnesota, elected to the National Academy of Engineering in 1998 for machining and coating research.

Subbian Panayampalli

Subbian Panayampalli, also known as Panayampalli Subbian Satheshkumar, is a CDC scientist who leads poxvirus and rabies diagnostics research and received a 2019 PECASE award.

Oct 20, 2026

Subbotin (lunar crater)

Subbotin is a 71.66-km-wide impact crater on the lunar far side at about 29.3°S, 135.7°E, IAU feature ID 5740, named for Soviet astronomer Mikhail F. Subbotin and approved in 1970.

Oct 22, 2026

Subcarpathian Rus'

Subcarpathian Rus' (Podkarpatská Rus) was a province of the First Czechoslovak Republic from 1919 to 1938, today's Zakarpattia in western Ukraine; renamed Carpathian Ukraine, it declared independence on 15 March 1939 before Hungarian occupation.

Subcarrier index modulation

Subcarrier index modulation (SIM) is an OFDM transmission technique that conveys extra bits through the pattern of active subcarriers, adding an index dimension to amplitude and phase modulation.

Subcarrier intensity modulation

Subcarrier intensity modulation (SIM) is an optical wireless communication technique in which a radio-frequency subcarrier modulates the intensity of a light source, recovered by direct detection.

Subcarrier multiplexing

Subcarrier multiplexing, or SCM, is an electrical frequency-division multiplexing scheme in which several bandpass signals drive one optical modulator, so a single optical carrier carries multiple channels.

Oct 21, 2026

Subchondral Arthroplasty

Subchondral arthroplasty (Arthroplasty, Subchondral, MeSH D054544) is the group of marrow-stimulation surgeries, abrasion arthroplasty, subchondral drilling, and microfracture, that perforate subchondral bone to fill cartilage defects with fibrocartilage.

Subclavian artery

Subclavian artery: paired artery of the upper thorax and neck; left arises from the aortic arch, right from the brachiocephalic trunk; three scalene-defined parts; becomes the axillary artery at the first rib.

Subclavian steal syndrome

Subclavian steal syndrome: symptoms from reversed vertebral artery flow caused by proximal subclavian artery stenosis, also called coronary subclavian steal after LIMA grafting; mostly left-sided, atherosclerotic, usually benign, treated conservatively with stenting or bypass for selected symptomatic cases.

Subcloning (molecular biology)

Subcloning is a molecular cloning technique in which a DNA fragment already carried in one plasmid is moved into a different vector, rather than cloned directly from genomic DNA.

Subcomandante Marcos

Subcomandante Marcos, masked spokesperson and strategist of Mexico's Zapatista EZLN, led the January 1, 1994 Chiapas uprising, wrote its famous communiqués, was identified by the government as Rafael Sebastián Guillén Vicente, and became Subcomandante Galeano in 2014.

Subcompact car

A subcompact car is a North American classification for cars smaller than compacts, defined by the EPA as having 85 to 99 cubic feet of interior volume.

Subconjunctival injection

A subconjunctival injection places medication into the space between the conjunctiva and sclera of the eye, delivering a drug depot that diffuses through the sclera to ocular tissues.

Subconscious

The subconscious, or subconscious mind, is a popular and quasi-technical term for mental processes outside conscious awareness that still influence thought, feeling, and behavior, studied as unconscious or implicit processing.

Subcontractor

A subcontractor is a firm or person hired by a prime contractor, not the client, to perform part of the work the prime has promised to deliver.

Subconvexity problem

The subconvexity problem is the problem in analytic number theory of beating the convexity bound for L-functions by a power saving in the analytic conductor.

Subcooling

Subcooling, also called undercooling, is the number of degrees a liquid refrigerant is below its saturation temperature at the same pressure, measured in the liquid line.

Oct 21, 2026

Subcorneal pustular dermatosis

Subcorneal pustular dermatosis (Sneddon-Wilkinson disease) is a rare chronic neutrophilic skin disease with sterile subcorneal pustules on the trunk and flexures; dapsone is first-line treatment.

Oct 21, 2026

Subcortical band heterotopia

Subcortical band heterotopia (SBH, double cortex syndrome, subcortical laminar heterotopia): a neuronal migration disorder forming a gray-matter band beneath the cortex, mainly in females, caused by DCX or PAFAH1B1 mutations and part of the lissencephaly spectrum.

Subcostal transversus abdominis plane block

The subcostal transversus abdominis plane (SCTAP) block is an anesthesia technique that injects local anesthetic beneath the costal margin to numb the upper abdominal wall, used for surgery above the umbilicus such as cholecystectomy.

Subcritical water extraction

Subcritical water extraction (SWE) is a green technique that uses hot pressurized liquid water as the sole solvent, replacing organic solvents, to extract plant bioactives and pollutants.

SubCULTron

SubCULTron was an EU Horizon 2020 project, running from 2015 to 2019, that deployed a swarm of more than 120 underwater robots to monitor the Venice lagoon.