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Suanfa Tongzong
Suanfa Tongzong (算法统宗) is a 1592 Chinese mathematical work by Ming mathematician Cheng Dawei of Xiuning, the most widely circulated Chinese math book of its era, built entirely on the abacus.
Suanpan (算盘)
The suanpan (算盘), also called the Chinese abacus, is a calculating frame of rods with two five-valued beads above a crossbar and five one-valued beads below.
Suantou Sugar Factory Cultural Park
Suantou Sugar Factory Cultural Park (蒜頭糖廠蔗埕文化園區), in Liujiao, Chiayi, Taiwan: a 1906 Meiji Sugar factory, once Taiwan's third largest, closed after Typhoon Nari in 2001 and now a heritage park with a five-fen tourist train to HSR Chiayi and the National Palace Museum's Southern Branch.
Suárez-type remote C–H oxidation of alcohols
Suárez-type remote C–H oxidation of alcohols is a radical reaction in which an alkoxy radical, generated from a hypoiodite, abstracts a remote δ C–H bond via 1,5-hydrogen atom transfer.
Suasa
Suasa: Roman municipium in the middle Cesano valley at Castelleone di Suasa (Ancona, Marche), founded after Sentinum (295 BC), a praefectura from 232 BC, municipium in the 1st century BC, abandoned by the 6th century AD; excavated by the University of Bologna since 1987.
Sub Pop
Sub Pop, also known as Sub Pop Records or Subterranean Pop, is an independent record label founded in Seattle in 1988 by Bruce Pavitt and Jonathan Poneman.
Sub Radices
Sub Radices (Subradice), Roman mansio on the Oescus–Philippopolis road at the southern foot of the Troyan Pass near Hristo Danovo, Bulgaria; garrisoned by cohors I Aureliana, occupied 2nd–6th centuries AD.
Sub Romula
Sub Romula (Subromula), a Roman road station on the Via Appia between Aeclanum and Venusia in Hirpinian Italy, named for the Samnite city Romulea; recorded in the Antonine Itinerary, Peutinger Table, and Ravenna Cosmography, near Guardia Lombardi/Bisaccia.
Sub specie aeternitatis
Sub specie aeternitatis, "under the aspect of eternity," is a Latin phrase coined by Spinoza in the Ethics for conceiving things as following necessarily from God's nature, later used by Wittgenstein.
Sub-barrier fusion hindrance in carbon-12 + carbon-12
Sub-barrier fusion hindrance is the unexpected suppression of heavy-ion fusion cross sections far below the Coulomb barrier, first detected in 2002 and debated for carbon-12 + carbon-12 fusion.
Sub-bottom profiler
A sub-bottom profiler (SBP) is a sonar-based geophysical survey tool that uses low-frequency sound pulses to map the thickness and composition of sediment layers beneath the seafloor.
Sub-bottom profiling
Sub-bottom profiling is a marine acoustic survey method in which sonar pulses transmitted through the seafloor image buried sediment layers, producing a continuous vertical cross-section along a vessel's track.
Sub-inspector
Sub-inspector (SI), a mid-level police rank in South and Southeast Asian forces, between inspector and assistant sub-inspector in India and Bangladesh and the top rank-and-file rank in Malaysia; recruited via state exams with physical tests.
Sub-Nyquist sampling
Sub-Nyquist sampling acquires an analog signal at an average rate below its Nyquist rate and reconstructs it, possible only when the signal has known structure such as sparsity or a multiband spectrum.
Sub-replacement fertility
Sub-replacement fertility is a total fertility rate below the replacement level of about 2.1 births per woman. Over half of all countries, including India, China, and the US, are below it; global TFR was 2.25 in 2024 and is projected near 1.6 by 2100.
Sub-Roman Britain
Sub-Roman Britain is a label for Britannia in the fifth and sixth centuries AD, the period between the end of Roman rule and the emergence of early medieval kingdoms.
Sub-Saharan Africa
Sub-Saharan Africa: the African Transition Zone and all regions south of the Sahara, a UN and World Bank statistical grouping of about 48 countries. Key facts: independence in the late 1950s-1960s, 4.5% growth in 2025, 42% urban, top 10% income share 55%.
Sub-Zero (Mortal Kombat)
Sub-Zero, also known as Bi-Han, is an ice-controlling ninja of the Lin Kuei clan in the Mortal Kombat series, present since the first game in 1992; later the name is held by his brother Kuai Liang.
Suba, Bogotá
Suba is the 11th locality of the Capital District of Bogotá, Colombia, in the city's northwest; a Muisca settlement colonial from 1550, it was a Cundinamarca municipality until its annexation to Bogotá in 1954.
Subacromial bursitis
Subacromial bursitis, part of subacromial pain syndrome (impingement, rotator cuff tendinopathy), is inflammation of the subacromial-subdeltoid bursa causing painful arc shoulder pain; treated nonoperatively, steroid injections give short-term relief, surgery shows no benefit.
Subacute Care
Subacute care, also called post-acute care, is skilled medical and nursing care for patients past the acute illness phase but needing more than long-term care, typically one to two therapy hours daily in skilled nursing facilities.
Subacute combined degeneration of spinal cord
Subacute combined degeneration (SACD, SCD) is vitamin B12 deficiency myelopathy of the dorsal and lateral spinal cord columns, causing sensory loss and spasticity; increasingly caused by nitrous oxide inactivation of B12.
Subacute cutaneous lupus erythematosus
Subacute cutaneous lupus erythematosus (SCLE) is a photosensitive, non-scarring subtype of cutaneous lupus with annular or papulosquamous lesions, strong anti-Ro/SSA association, 20-40% drug-induced cases, and systemic progression risk.
Subacute inflammatory demyelinating polyneuropathy
Subacute inflammatory demyelinating polyneuropathy (SIDP, ORPHA:206594) is a rare immune-mediated neuropathy intermediate between GBS and CIDP, with symmetric weakness and elevated CSF protein peaking over 4 to 8 weeks.
Subacute osteomyelitis
Subacute osteomyelitis, or Brodie's abscess, is a low-grade bone infection with insidious onset, no fever, pain for weeks to months, Staphylococcus aureus most often, and metaphyseal lytic lesions in children.
Subacute sclerosing panencephalitis
Subacute sclerosing panencephalitis (SSPE), formerly Dawson's disease, is a rare, fatal progressive brain disease caused by persistent defective measles virus infection, appearing 4-10 years after measles, prevented only by vaccination.
Subacute thyroiditis
Subacute (de Quervain) thyroiditis: self-limited, painful, post-viral thyroid inflammation with thyrotoxic then hypothyroid phases, low RAIU, high ESR, and recovery in most patients.
Subak (irrigation)
Subak is Bali's traditional irrigation system, in which about 1,200 associations of rice farmers cooperatively manage canals, weirs, and water temples, a practice documented since the 9th century.
Subal C. Kumbhakar
Subal C. Kumbhakar is an econometrician and SUNY Distinguished Research Professor at Binghamton University, known for stochastic frontier analysis and the widely cited book Stochastic Frontier Analysis.
Subaltern (postcolonialism)
Subaltern, in postcolonialism, denotes people outside the dominant elite; also called subalternity. Defined by Ranajit Guha's Subaltern Studies (1982) and Spivak's 'Can the Subaltern Speak?', it names peasants, workers, and marginalized groups excluded from elite historiography.