All articles starting with S
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Sintra
Sintra, Portugal: town and Serra forming the Cultural Landscape of Sintra, UNESCO World Heritage site since 1995 and first centre of European Romantic architecture, with Pena Palace, Moorish Castle and Monserrate gardens.
Sinuhé Fernández
Sinuhé Fernández Rodríguez is a Spanish road racing cyclist, born in 2000 in Asturias, who rides for the ProTeam Burgos Burpellet BH and excels in breakaways.
Šinuḫtu
Šinuḫtu (also written Shinuhtu) was a small Neo-Hittite kingdom in the Tabal region of southern Anatolia, whose king Kiyakiya was exiled by Sargon II around 718 BC.
Sinui byeolcho
Sinui byeolcho (also Sinui-gun) was a Goryeo military unit formed in the 1250s by Choe Hang from escaped Mongol prisoners; one of the three Sambyeolcho, it was disbanded in 1270.
Sinŭiju
Sinŭiju (신의주시), capital of North Pyongan province, North Korea, on the Yalu River opposite Dandong, China; about 360,000 people. Main China-DPRK trade gateway; New Yalu River Bridge opened there October 15, 2026 after a 12-year delay.
Sinularia
Sinularia, established in 1898, is a genus of about 150 species of leathery tropical soft corals in the family Alcyoniidae, dominant on many shallow Indo-Pacific reefs from the Red Sea to the Great Barrier Reef.
Sinulog
Sinulog, also called the Sinulog Festival, is Cebu City's annual January festival honoring the Santo Niño de Cebú, drawing crowds of up to several million.
Sinus (anatomy)
In anatomy, a sinus is an air-filled cavity within a bone or tissue, most often one of the four paired paranasal sinuses around the nose, which all drain into it.
Sinus Aestuum
Sinus Aestuum ("Seething Bay") is a 316.5-km lunar mare bay on the Moon's central near side, IAU-named in 1935, an ancient impact basin with low-Ti basalts and a large spinel-rich pyroclastic deposit.
Sinus Amoris
Sinus Amoris ("Bay of Love") is a 189.10-km bay-shaped lunar mare at 19.92°N, 37.29°E on the Moon's near side, northeast of Mare Tranquillitatis; IAU-approved Latin name, 1976.
Sinus Asperitatis
Sinus Asperitatis, "Bay of Roughness," is a 219 km lava bay on the Moon's near side at 5.41°S 27.49°E, north of Theophilus, merging into Mare Tranquillitatis; IAU-approved 1976.
Sinus bradycardia
Sinus bradycardia, also called sinus bradyarrhythmia, is a normal-rhythm heartbeat slower than 60 beats per minute, often harmless and seen in athletes and during sleep.
Sinus Concordiae
Sinus Concordiae, Latin for Bay of Harmony, is a 159 km lunar bay on the eastern edge of Mare Tranquillitatis at 10.98°N, 42.47°E, IAU-approved in 1976, bordered by Palus Somni and the ruined crater Da Vinci.
Sinus floor augmentation
Sinus floor augmentation, also called maxillary sinus floor augmentation, is a dental surgical procedure that lifts the sinus floor and adds bone graft to anchor implants in the upper jaw.
Sinus Honoris
Sinus Honoris (Bay of Honor) is a 111.61 km IAU-approved lunar bay of solidified lava at 11.72°N, 17.87°E on the northwest margin of Mare Tranquillitatis, named in 1976.
Sinus lift
A sinus lift, or maxillary sinus floor augmentation, is surgery that raises the sinus floor and adds bone so dental implants can anchor in the upper jaw.
Sinus Lunicus
Sinus Lunicus (Lunik Bay) is a 119.18 km lava bay on the southeastern edge of Mare Imbrium, named in 1970 for the Luna 2 impact site, near the Apollo 12 landing.
Sinus Medii
Sinus Medii, Latin for Central Bay, is a small lunar mare about 170 km across, at the center of the Moon's near side and explored by the Surveyor landers.
Sinus node dysfunction
Sinus node dysfunction, formerly sick sinus syndrome, is impaired sinoatrial node impulse generation or conduction causing bradycardia, pauses, or chronotropic incompetence; treated with dual-chamber pacemakers per DANPACE and MOST trial evidence.
Sinus node reentrant tachycardia
Sinus node reentrant tachycardia (SNRT, SANRT, sinoatrial reentry) is a rare paroxysmal focal atrial tachycardia from microreentry in the sinus node, with sinus-like P waves, 100-150 bpm, EPS diagnosis, and ablation when drugs fail.
Sinus pause
Sinus pause (sinus arrest): transient failure of the sinoatrial node to discharge, seen on ECG as absent P waves; pauses over 2-3 seconds, distinguished from SA exit block by a non-multiple P-P interval.
Sinus rhythm
Sinus rhythm is the normal heart rhythm initiated by the sinoatrial node, the heart's natural pacemaker, at a rate of 60 to 100 beats per minute.
Sinus Roris
Sinus Roris ("Bay of Dew") is a 195-km lunar sinus, a small basalt bay on the Moon's northern nearside between Oceanus Procellarum and Mare Frigoris, IAU-named in 1935 with olivine-rich young basalts.
Sinus Successus
Sinus Successus ("Bay of Success") is one of the Moon's twelve named sinūs, a 126.65 km basaltic bay at 1.12°N, 58.52°E near Mare Fecunditatis, IAU-approved in 1979, near the Luna 16 and 20 landing sites.
Sinus tachycardia
Sinus tachycardia: a regular heart rhythm from the sinoatrial node at over 100 bpm, usually an appropriate response to exercise, fever, or stress; also covers inappropriate sinus tachycardia (IST), a diagnosis of exclusion defined by resting HR >100 bpm.
SINUS-24 trial
SINUS-24 (LIBERTY NP SINUS-24, NCT02912468): phase 3 trial of dupilumab 300 mg every 2 weeks versus placebo for 24 weeks in 276 adults with severe CRSwNP; significantly improved nasal polyp score and congestion.
SINUS-52 trial
SINUS-52 (LIBERTY NP SINUS-52, NCT02898454), a 52-week phase 3 trial of dupilumab 300 mg in 448 adults with severe CRSwNP, met co-primary nasal polyp score and congestion endpoints versus placebo.
Sinusitis
Sinusitis (rhinosinusitis) is inflammation of the sinus lining, usually viral. Key facts: acute under 4 weeks, chronic over 12 weeks; ABRS diagnosed at 10 days without improvement or double worsening; amoxicillin 5-7 days first line.
Sinusoidal pulse-width modulation
Sinusoidal pulse-width modulation is a modulation technique that controls a DC-AC inverter by comparing a sinusoidal reference with a high-frequency triangular carrier, reducing output harmonics.
Sinusotomy
Sinusotomy is the surgical opening of a paranasal sinus, such as the maxillary, ethmoid, frontal, or sphenoid, now usually done endoscopically to restore drainage and ventilation in chronic rhinosinusitis.