All articles starting with S

Sprite Vallis

Sprite Vallis is a 305 km valley on Ariel, a moon of Uranus, IAU-named in 1988 for Earth spirits; once mapped as a volcanic fissure, now studied as a candidate spreading center.

Spritz (cocktail)

Spritz: Italian aperitif cocktail from Veneto, born when Austrian soldiers diluted wine (spritzen). Prosecco, bitter liqueur (Aperol, Select, Campari), soda over ice; IBA official since 2011.

Sprocket

A sprocket is a toothed wheel that meshes with a chain or toothed belt to transmit rotary power through positive engagement, without slipping, in bicycles, conveyors, and industrial drives.

Sprout Endurance Partners

Sprout Endurance Partners is a $467.5 million venture capital fund formed in 2018 in Menlo Park, California, by SVB Capital veterans Sulu Mamdani, Aaron Gershenberg, and Beau Laskey.

Sprout Social is a Chicago-based software company, founded in 2010 and public on Nasdaq since 2019, selling a social media management platform for publishing, engagement, analytics, and customer care.

Sprouted bread

Sprouted bread is bread made from whole grains allowed to germinate before milling, as in Ezekiel 4:9 and Essene bread. Sprouting raises phytase activity, reduces phytate, and may lower glycemic response, though evidence is mixed.

Sprouting

Sprouting: germinating seeds (alfalfa, mung bean, broccoli, radish) and eating the whole young sprout. Nutrient-dense but a known foodborne illness vehicle; FDA recorded 52 sprout outbreaks, 1996-2020.

Sprouts (game)

Sprouts, a 1967 Conway-Paterson pencil-and-paper topological game; players join spots with non-crossing curves, games last 2n to 3n-1 moves, and the period-six Sprouts conjecture remains unproven past computed values up to 47 spots.

Sprouts Farmers Market

Sprouts Farmers Market (Nasdaq: SFM) is a Phoenix-headquartered specialty grocer of fresh, natural, and organic food, founded in 2002 in Chandler, Arizona by the Boney family, with 490 stores in 25 states as of mid-2026.

Oct 20, 2026

Sprouty

Sprouty (SPRY1-4), conserved negative-feedback inhibitors of receptor tyrosine kinase/Ras-ERK MAPK signaling, discovered in Drosophila in 1998; modulate development, and act as oncogenes or tumor suppressors in cancer depending on isoform and context.

SprT-like domain-containing protein Spartan

SPRTN (Spartan, DVC1, C1orf124) is a human 489-aa DNA-dependent zinc metalloprotease that cleaves DNA-protein crosslinks at DNA junctions during replication-coupled and global-genome repair; mutations cause Ruijs-Aalfs progeria syndrome.

Spruance-class destroyer

The Spruance class was a class of 31 United States Navy destroyers of the 1970s, built primarily for anti-submarine warfare and named for Admiral Raymond Spruance.

Spruce

Spruce, genus Picea, 40-50 evergreen conifer species of the Northern Hemisphere with peg-attached needles and pendant cones; includes Norway and Sitka spruce, major softwood timber trees threatened by bark beetles and drought.

Spruce Biosciences

Spruce Biosciences is a publicly traded biopharmaceutical company based in South San Francisco, California, founded in 2014 and developing tralesinidase alfa enzyme replacement therapy for Sanfilippo Syndrome Type B.

Spruce cultivation and ornamental horticulture

Spruce cultivation and ornamental horticulture: growing Picea species such as Colorado blue, Norway, and white spruce as landscape, dwarf, and Christmas trees; site selection, watering, dwarf cultivar classes, and pest management.

Spruce forest ecology

Spruce forest ecology is the study of forests dominated by spruce trees (genus Picea), covering how these evergreen conifers regenerate, interact with soil fungi, and respond to climate change.

Spruce hybrids and introgression

Spruce hybrids are natural crosses between Picea species where ranges meet, producing introgression, the movement of genes between species; despite hybridization lasting at least 21,000 years, spruce species remain genetically distinct.

Spruce pests and diseases

Spruce pests and diseases are the insects, fungi, and fungus-like organisms that injure or kill spruce trees, led by the spruce beetle in North America.

Spruce Production Division

Spruce Production Division, a U.S. Army command of World War I (1917-1918) under Brig. Gen. Brice P. Disque, using about 30,000 soldiers in Pacific Northwest logging camps to produce aircraft-grade Sitka spruce, reaching 143 million board feet.

Spruce silviculture and timber

Spruce silviculture and timber covers the plantation management, harvesting, and wood utilization of spruce, chiefly Norway and Sitka spruce, used for construction timber, pulp, and tonewood.

Oct 3, 2026

Sprung

Sprung (2022) is an Amazon Freevee single-camera comedy created by Greg Garcia. Former inmate Jack (Garret Dillahunt), freed early in the pandemic, joins Rooster, Barb (Martha Plimpton), and Gloria in heists for good; one 9-episode season.

Oct 22, 2026

Sprung rhythm

Sprung rhythm is a metrical system devised by Gerard Manley Hopkins, with a fixed number of stressed syllables per line and a variable number of unstressed ones.

SPRY domain

SPRY domain (SPla/ryanodine repeat; B30.2/PRYSPRY variant): a eukaryotic protein-protein interaction module with a bent beta-sandwich fold, found in ~100 human proteins, mediating immune substrate binding in TRIM proteins such as TRIM5alpha and TRIM21.

SPRY2

SPRY2 (sprouty RTK signaling antagonist 2, hSPRY2) is a human protein-coding gene at 13q31.1 encoding a negative feedback inhibitor of receptor tyrosine kinase/Ras/ERK signaling, with context-dependent tumor suppressor or oncogene roles in cancer.

SPSS

SPSS, short for Statistical Package for the Social Sciences, is commercial statistical analysis software developed at Stanford, first released in 1968, and acquired by IBM in 2009.

SPT Labtech

SPT Labtech is a British laboratory automation company headquartered in Melbourn, Cambridgeshire, making liquid handling, sample storage, and cryo-EM instruments such as the mosquito pipettor and chameleon.

SPT-100

The SPT-100 (Russian СПД-100, Stationary Plasma Thruster) is a 1.35 kW Hall-effect thruster built by Fakel in Kaliningrad, Russia, flown for spacecraft station-keeping since 1994.

SPT-3G

SPT-3G is the third-generation millimeter-wavelength camera on the 10-meter South Pole Telescope in Antarctica, installed in January 2017 with about 16,000 detectors to map the cosmic microwave background's temperature and polarization.

Oct 20, 2026

SPTAN1

SPTAN1 (spectrin alpha, non-erythrocytic 1; alpha-fodrin, alpha-II spectrin) is a human gene at 9q34.11 encoding the non-erythroid alpha spectrin cytoskeletal scaffold protein; pathogenic variants cause DEE5 epileptic encephalopathy, spastic paraplegia, ataxia, motor neuropathy, and distal myopathy.