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Dense plasma focus
A dense plasma focus (DPF) is a pulsed plasma device whose coaxial accelerator compresses plasma into an extremely dense pinch, producing intense pulses of neutrons and x rays.
Dense wavelength-division multiplexing
Dense wavelength-division multiplexing (DWDM) is an optical fiber technique that carries many tightly spaced channels on a single fiber strand; it is the capacity workhorse of long-haul and submarine networks.
DenseNet
DenseNet, short for Dense Convolutional Network, is a convolutional neural network architecture in which each layer connects to every preceding layer, introduced in 2016 and recognized with a CVPR 2017 Best Paper Award.
Densitometer
A densitometer is an instrument that measures how much light a material absorbs or blocks, used to control ink on printing presses and darkness of film.
Density altitude
Density altitude is the altitude in the standard atmosphere at which air density matches the air at a given point, used by pilots as an index of aircraft performance.
Density index
The density index, also known as the Straube-Pfeiffer test or reduced pressure test, is a foundry quality-control number expressing, as a percentage, the gas porosity tendency of molten aluminum.
Density peak clustering
Density peak clustering is a clustering algorithm, proposed by Rodriguez and Laio in Science in 2014, that finds cluster centers as points of high density far from denser points.
Denso (株式会社デンソー)
Denso Corporation, founded in 1949 as Nippondenso through the separation of Toyota's electrical components factory, is a Japanese automotive parts supplier and the world's second largest.
Denso Wave
Denso Wave is a Japanese subsidiary of DENSO Corporation that makes industrial robots and automatic data capture equipment, best known as the creator of the QR Code.
Denver International Airport
Denver International Airport is the primary airport for Denver, Colorado, opened in 1995 on a 53-square-mile site, now the fourth-busiest airport in the United States.
Denver Millennium Bridge
The Denver Millennium Bridge is a cable-stayed pedestrian bridge completed in 2002, carrying the 16th Street pedestrian mall over railroad tracks near Denver Union Station.
Denver Union Station
Denver Union Station is a multimodal rail and bus hub in Denver's LoDo district, serving Amtrak, RTD commuter and light rail, and buses, rebuilt around the historic 1914 terminal.
Denville Hall
Denville Hall is a residential and nursing care home in Northwood, London, opened in 1926 by Alfred Denville MP as a haven for retired actors and actresses.
Denza B5
The Denza B5, also known as the Fangchengbao Bao 5 (豹5) or Leopard 5, is a five-seat plug-in hybrid off-road SUV built by BYD, launched in China in November 2023.
Denza B8
The Denza B8, sold in China as the Fangchengbao Bao 8 (方程豹 豹8), is a full-size seven-seat plug-in hybrid off-road SUV built by BYD Auto and launched in November 2024.
Denza N8L
The Denza N8L (腾势N8L) is a large six-seat luxury SUV from Denza, BYD's premium brand, launched in China in October 2025 as a plug-in hybrid.
Denza N9 (腾势)
The Denza N9 (腾势N9) is a full-size six-seat plug-in hybrid luxury SUV produced by Denza, BYD's premium brand; launched in China in March 2025, it is Denza's flagship SUV.
Denza Z (腾势Z)
The Denza Z (腾势Z) is an all-electric four-seat supercar from Denza, BYD's premium brand, revealed in 2026 with a three-motor powertrain rated at 1,180 kW.
Denza Z9 (腾势Z9)
Denza Z9 (腾势Z9), sold alongside the Denza Z9 GT shooting brake, is a full-size technology-luxury flagship sedan from Denza, BYD's premium marque, launched in China in 2024 and sold with tri-motor plug-in hybrid or electric powertrains.
Denza Z9S (腾势Z9S)
The Denza Z9S (腾势Z9S) is a battery-electric executive fastback sedan from Denza, BYD's premium brand, launched in China in September 2026 with up to 1,100 km of range.
Deodorant
Deodorant, or underarm deodorant, is a personal care product applied to the skin, most often the underarms, that reduces body odor by targeting odor-causing bacteria or masking smell with fragrance.
Deoksugung
Deoksugung (덕수궁), formerly Gyeongungung, is a Joseon dynasty royal palace in Jung-gu, Seoul, that served as the imperial palace of the Korean Empire proclaimed by Emperor Gojong in 1897.
Deorbit of Mir
The deorbit of Mir was the deliberate, controlled reentry of Russia's Mir space station into the South Pacific Ocean on March 23, 2001, after 15 years in orbit.
Deorbit sail
A deorbit sail, also called a drag sail, is a deployable membrane that raises a satellite's atmospheric drag so it reenters and burns up sooner, without propellant.
Deoxidation of steel
Deoxidation of steel is the removal of dissolved oxygen from liquid steel by adding elements with a strong oxygen affinity, chiefly aluminum, silicon, and manganese, producing sound steel.
Deoxo reactor
A deoxo reactor is a catalytic vessel that removes oxygen from gas streams by reacting it with hydrogen over a platinum or palladium catalyst, converting the two gases to water.
Depalletizing
Depalletizing is the process of removing cases, layers, or containers from a pallet one by one, the reverse of palletizing, using bulk, layer, or robotic systems.
Departamento Nacional de Trânsito
The Departamento Nacional de Trânsito (Denatran) was Brazil's highest federal traffic authority, enforcing traffic law and managing the RENAVAM vehicle registry until replaced by Senatran in 2021.
Department for Energy Security and Net Zero
The Department for Energy Security and Net Zero (DESNZ) is a UK government department responsible for energy security, protecting billpayers, and delivering the transition to net zero emissions.
Department for Transport
The Department for Transport (DfT) is the UK government department responsible for transport policy in England, delivered through bodies like National Highways and the DVLA.