All articles starting with S

Stellate non-hereditary idiopathic foveomacular retinoschisis

SNIFR (stellate non-hereditary idiopathic foveomacular retinoschisis) is a rare, usually unilateral macular schisis of the Henle fiber layer in middle-aged women, described by Ober et al. in 2014, with preserved vision and diagnosis by exclusion.

Stellenbosch

Stellenbosch, Western Cape town founded 1679 by Simon van der Stel on the Eerste River, South Africa's second oldest town, home of Stellenbosch University, its wine route, and a R13 billion tourism economy.

Stellenbosch University

Stellenbosch University (Universiteit Stellenbosch), a public research-intensive university in Stellenbosch, South Africa, established 2 April 1918 from Victoria College. 10 faculties, five campuses, about 35,000 students; known for its contested Afrikaans, English and isiXhosa language policy.

Oct 20, 2026

Steller

Mount Steller is a 2,272 m glaciated Holocene-active stratovolcano in Katmai National Park, Alaska, between Denison and Kukak volcanoes; unmonitored, no historical eruptions, named 1928 for naturalist Georg Wilhelm Steller.

Steller sea lion

Steller sea lion (Eumetopias jubatus), or northern sea lion: largest otariid, North Pacific coasts. Males to 2,500 lb; western DPS endangered after 77-81% decline, eastern DPS delisted 2013.

Steller's jay

Steller's jay (Cyanocitta stelleri), Chara de Steller, Geai de Steller: a large black-crested, blue-bodied corvid of western North American conifer forests from Alaska to Nicaragua, named for naturalist Georg Steller; IUCN Least Concern, about 3 million birds.

Steller's sea cow

Steller's sea cow (Hydrodamalis gigas) was a giant kelp-eating sirenian of the Bering Sea's Commander Islands, discovered by Georg Steller in 1741 and hunted to extinction by 1768, the first historical marine mammal extinction at human hands.

Steller's sea eagle

Steller's sea eagle, Haliaeetus pelagicus, is a large fish eagle of the Russian Far East and one of the world's heaviest eagles, wintering mainly on Hokkaido, Japan.

Sep 19, 2026

Stellex Capital Management

Stellex Capital Management is a New York-based private equity firm founded in 2014 by Ray Whiteman and Michael Stewart, spun out of Carlyle's distressed-investing team to buy troubled middle-market companies.

Stellex Capital Partners

Stellex Capital Partners is the flagship private equity fund family of Stellex Capital Management, a New York firm founded in 2014 by Ray Whiteman and Michael Stewart.

Stellite

Stellite is a family of cobalt-based wear- and corrosion-resistant alloys developed by Elwood Haynes in 1887, used for hardfacing valve seats, pump shafts, and saw tips.

Oct 20, 2026

STELLO-like

STELLO-like (IPR005049, Pfam PF03385) is a protein family of Golgi-localized glycosyltransferase-related proteins in animals and plants; Arabidopsis STELLO1/2 regulate cellulose synthase complex assembly.

Stelvio Pass

Stelvio Pass (Passo dello Stelvio, Stilfser Joch), 2,757–2,758 m alpine pass between Lombardy and South Tyrol, Italy. Highest paved pass in Italy, second in the Alps; SS38 road built 1820–1825 by Carlo Donegani, 48 hairpins on the Trafoi side, Giro d'Italia classic.

Stem (typography)

In typography, a stem is the main vertical or full-length angled stroke of a letterform, such as the uprights of b and H, and its weight defines a typeface.

Stem cell

A stem cell is a cell that can both replicate itself and differentiate into specialized cell types; types include embryonic, adult, and laboratory-made induced pluripotent stem cells.

Stem cell controversy

The stem cell controversy covers ethical, legal, religious, and scientific disputes over stem cell research, centered on deriving human embryonic stem cells, which typically destroys embryos.

Stem cell factor

Stem cell factor (SCF, Steel factor, Kit ligand, mast cell growth factor) is a dimeric cytokine activating the c-Kit receptor tyrosine kinase, essential for hematopoiesis, pigmentation, and fertility; recombinant SCF (ancestim) was approved in Canada and New Zealand.

Sep 29, 2026

Stem cell isolation

Stem cell isolation is the set of laboratory methods for separating rare stem cells from mixed populations in tissues, blood, or cultures, producing enriched cells for transplantation and research.

Stem cell of epidermis

Epidermal stem cells (EPSCs, skin epithelial stem cells) are self-renewing adult stem cells in the epidermis and hair follicle bulge that generate keratinocytes, hairs, and sebocytes, and underpin cultured epidermal autograft, vitiligo, and gene-corrected epidermolysis bullosa therapies.

Stem cell research

Stem cell research is the branch of biology and medicine that studies stem cells, unspecialized cells that renew themselves and differentiate, aiming to turn those properties into disease models and therapies.

Stem Cell Transplantation

Stem cell transplantation (HSCT, bone marrow transplant): infusion of healthy blood-forming stem cells after high-dose chemotherapy; autologous, allogeneic, syngeneic, or cord blood; treats leukemia, lymphoma, myeloma, aplastic anemia, sickle cell disease.

Oct 20, 2026

Stem cells

Stem Cells (STEM CELLS) is a monthly peer-reviewed journal on stem cell biology, founded 1981 by Metcalf, Lajtha, and Takaku, published by AlphaMed Press then Oxford University Press since 2022, ISSN 1066-5099.

Oct 22, 2026

STEM depth sectioning

STEM depth sectioning is a 3D electron microscopy method that images different depths of a sample by scanning a focused probe through a series of defocus values.

Stem Inc

Stem Inc is an American clean energy software company founded in 2009 and headquartered in Houston, Texas, providing AI-enabled software that monitors and optimizes solar and battery storage assets worldwide.

Stem rust

Stem rust (black rust), wheat disease caused by Puccinia graminis f. sp. tritici; Ug99 race TTKSK virulent to Sr31 emerged in Uganda 1998/99, spread to 14 countries, detected in Nepal 2023; controlled by resistant cultivars and barberry eradication.

STEM trial

STEM trial (Supportive Text vs Email Messaging trial, NCT04638231): randomized noninferiority pilot trial in Edmonton, Canada comparing daily CBT-based supportive text messages versus email for major depressive disorder; found no significant difference between channels (N=66).

Stem-and-leaf display

A stem-and-leaf display, also called a stemplot, is a data display that splits each value into a stem and a leaf, showing distribution shape while keeping all values.

Stem-cell therapy

Stem-cell therapy: transplanting stem cells to treat disease. Established form is hematopoietic stem cell transplantation (HSCT, bone marrow); only FDA-approved US products are cord-blood blood-forming stem cells; most other uses are unproven.

Stemflow

Stemflow is precipitation intercepted by a plant canopy that runs down stems, branches, and trunks to the soil, concentrating water and nutrients at the plant's base.