All articles A–Z

Subtotal gastrectomy

Subtotal gastrectomy is an operation removing the distal 70% to 80% of the stomach, typically for distal gastric cancer, leaving a remnant reconnected by Billroth or Roux-en-Y reconstruction.

Subtotal thyroidectomy is an operation removing most of both thyroid lobes with the isthmus, leaving a small remnant, used to treat hyperthyroidism and goiter, though guidelines now favor total thyroidectomy.

Subtraction

Subtraction is one of the four basic arithmetic operations, written with the minus sign (−) as minuend − subtrahend = difference, as in 7 − 4 = 3.

Subtraction osteotomy

Subtraction osteotomy, also called closing wedge osteotomy, is a bone-cutting procedure that removes a wedge of bone so the segments close together, realigning and shortening it.

Subtraction Technique

Subtraction Technique: medical imaging method combining two registered images so unchanged structures cancel, showing only differences like contrast-filled vessels. MeSH D013382, established 1973; spans photographic subtraction (1935), digital subtraction angiography (1980), dual-energy and temporal subtraction.

Subtractive clustering

Subtractive clustering is a fast, one-pass, density-based fuzzy clustering algorithm that estimates the number of clusters and their centers directly from data, reported by Stephen L. Chiu in 1994.

Subtractive color

Subtractive color: color formed by absorbing wavelengths from white light with pigments, dyes, or inks. Primaries cyan, magenta, yellow (CMYK in printing); mixtures darken, unlike additive RGB light mixing.

Subtractive hybridization

Subtractive hybridization, also known as suppression subtractive hybridization, is a nucleic acid method that enriches sequences absent from a reference sample, reported in its modern form by Diatchenko and colleagues in 1996.

Subtractive synthesis

Subtractive synthesis is a sound synthesis method that shapes a harmonically rich source, such as a sawtooth waveform or noise, with filters that carve away parts of its spectrum.

Subtrochanteric fracture of femur

Subtrochanteric fracture of femur: break of the femoral shaft from the lesser trochanter to 5 cm distal, 7–34% of femur fractures, bimodal by age, treated mainly with intramedullary nailing; linked to bisphosphonate-related atypical fractures.

Sep 19, 2026

Subtronics

Subtronics, real name Jesse Kardon, is an American dubstep and riddim producer and DJ from Philadelphia who founded Cyclops Recordings and broke through in 2019 with "GRIZTRONICS."

Sep 19, 2026

Subtronics b2b Ganja White Night

Subtronics b2b Ganja White Night is a back-to-back dubstep pairing of American producer Subtronics and the Belgian duo Ganja White Night, first performed at Imagine Music Festival 2023.

Subtropical climate

A subtropical climate is a climate zone between the tropics and temperate latitudes, typically found on eastern sides of continents between 20° and 35° latitude.

Subtropical gyre

A subtropical gyre is a large rotating system of ocean currents in each ocean basin, clockwise in the Northern Hemisphere and counter-clockwise in the Southern Hemisphere.

Subtropical Indian Ocean Dipole

The Subtropical Indian Ocean Dipole (SIOD), also called the Indian Ocean Subtropical Dipole, is a climate variability mode in the southern Indian Ocean identified in 2001.

Subtropical jet stream

The subtropical jet stream is a band of strong westerly wind in the upper troposphere near 30° latitude, strongest in winter and driven by angular momentum conservation in the Hadley cell.

Subtropical mode water

Subtropical mode water (STMW) is a nearly uniform-temperature upper-ocean water mass, typically 250 m thick, formed by deep winter convective mixing on the equatorward side of western boundary current extensions in subtropical gyres.

Subtropics

The subtropics, or subtropical zone, are the climatic zones between the tropics and temperate regions, roughly 20 to 40 degrees of latitude in each hemisphere.

SubTropolis

SubTropolis, billed as the "World's Largest Underground Business Complex," is a commercial development in a former Kansas City, Missouri limestone mine that houses warehousing, cold storage, and data centers.

Subtyping

Subtyping is a relation between types in which a subtype value may be used wherever a supertype value is expected, a central mechanism of object-oriented type systems and polymorphism.

Subud

Subud is an international spiritual association founded in Java by Muhammad Subuh Sumohadiwidjojo, centered on the latihan, an exercise of surrender to the power of God.

Subunit vaccine

Subunit vaccine: a vaccine using only a pathogen fragment (protein, polysaccharide, or conjugate) instead of the whole organism; examples include Hib, pneumococcal, recombinant hepatitis B, HPV, and Novavax COVID-19 vaccines, typically needing adjuvants and multiple doses.

Suburb

Suburb: a residential district on a city's outskirts, within commuting distance and usually administratively separate. Covers streetcar and automobile suburbanization, definitional variation (US, Australia), FHA segregation, and post-2020 exurban growth.

Suburban Baths

Suburban Baths (Terme Suburbane), private Roman bath complex just outside Pompeii's Porta Marina, built early 1st century AD over disused walls; known for erotic apodyterium paintings, Cupid-Mars mosaic, and heated pool.

Suburban Commando

Suburban Commando is a 1991 American science-fiction comedy directed by Burt Kennedy, starring Hulk Hogan as an intergalactic warrior renting a room from a suburban family.

Sep 19, 2026

Suburban Diagnostics; Dr Lal PathLabs

Suburban Diagnostics is a Mumbai-based diagnostics chain founded by Dr Sanjay Arora in 1994, acquired outright by Dr Lal PathLabs in 2021 and dissolved in 2026.