All articles starting with L
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Luminous blue variable
A luminous blue variable, also called an S Doradus variable, is a massive evolved star that shows large, irregular changes in brightness, with Eta Carinae a famous member.
Luminous efficacy
Luminous efficacy is a measure of how well a light source produces visible light, in lumens per watt; a traditional 60 W incandescent lamp achieves about 14 lm/W.
Luminous fast blue optical transient
A luminous fast blue optical transient is a rare cosmic explosion that rises and fades within days, 10 to 50 times brighter than a typical supernova.
Luminous flux
Luminous flux is the measure of the total light a source emits in all directions, weighted by human eye sensitivity and measured in lumens, central to lighting design.
Luminous infrared galaxy
A luminous infrared galaxy (LIRG) is a galaxy radiating more than 10^11 solar luminosities in the infrared, powered by dust heated by starbursts or active black holes.
Luminous intensity
Luminous intensity is a measure of the visible light a source emits in a particular direction, measured in candela, the SI base unit weighted by human-eye sensitivity.
Luminous Power Technologies
Luminous Power Technologies is an Indian maker of inverters, batteries, and solar products for homes and small businesses, founded in 1988 and owned by Schneider Electric.
Luminous red nova
A luminous red nova, or red nova, is a stellar outburst from two merging stars, redder and dimmer than a supernova but more energetic than a classical nova.
Luminous The Symphony of Us
Luminous The Symphony of Us is EPCOT's nighttime spectacular at Walt Disney World, debuted December 5, 2023 on World Showcase Lagoon, replacing Harmonious; fireworks, fountains, and Disney songs with two original bookend numbers.
Lumiracoxib
Lumiracoxib, sold as Prexige, is a COX-2 selective NSAID developed by Novartis to treat osteoarthritis, rheumatoid arthritis, and acute pain. It was withdrawn worldwide in 2007 after serious liver injury.
LumiraDx
LumiraDx was a UK-based point-of-care diagnostics company founded in 2014 by Ron Zwanziger, which listed on Nasdaq in 2021 and sold its platform to Roche in 2024.
Lumírovci
The lumírovci, or Lumír group, were Czech writers of the 1870s and 1880s grouped around the journal Lumír, known as the cosmopolitan school and led by Jaroslav Vrchlický.
Lummo
Lummo, formerly BukuKas, is a SaaS startup based in Jakarta and Bengaluru, founded in 2019, that built bookkeeping and online-commerce software for Indonesian small merchants.
Lumo
Lumo is an ancient place at Roquebrune-Cap-Martin, France, cited as BAtlas 16 D2 Lumo and recorded in Pleiades (place 157880); its principal surviving monument is the Roman Lumones' Tomb on the Via Julia Augusta.
Lumo (AI assistant)
Lumo, also known as Proton Lumo, is a privacy-focused AI chat assistant from Proton AG, launched in July 2025 as the company's first AI product.
Lumo Dorsa
Lumo Dorsa is a 500-km-long dorsum (ridge belt) on Venus at 24.5N, 149E in Rusalka Planitia, IAU-approved in 1997 and named for a Tibetan goddess of sky, rain, and mist.
Lumos (fiber internet provider)
Lumos is a Mid-Atlantic fiber-to-the-home internet provider operated since 2025 as a T-Mobile and EQT joint venture, with a 7,500-mile network passing 475,000 homes and targeting 3.5 million by 2028.
Lump sum contract
A lump sum contract, also called a fixed-price contract, is a construction contract with a single price fixed at the outset regardless of the contractor's actual costs.
Lumpa Church
The Lumpa Church was an African Independent Church founded in 1953 in Northern Rhodesia, now Zambia, by the prophetess Alice Lenshina as an anti-witchcraft movement.
Lumpectomy
Lumpectomy, also called partial mastectomy or breast-conserving surgery, removes a breast tumor with a rim of healthy tissue while leaving the rest of the breast.
Lumped parameter model
A lumped parameter model represents a spatially distributed physical system by a finite network of discrete elements, so thermal, fluid, electrical, and mechanical behavior is analyzed with ordinary differential equations.
Lumped Raman amplifier
A lumped Raman amplifier (LRA) is a discrete optical amplifier in which a dedicated internal gain fiber provides Raman amplification, unlike the distributed type that uses the transmission fiber itself.
Lumpenproletariat
Lumpenproletariat (German: rag-proletariat, "rabble"), coined by Marx in The German Ideology (1845–46): the outcast stratum of beggars, criminals, and the chronically unemployed, deemed reactionary by Marx and Engels, revolutionary by Fanon.
Lumpia
Lumpia (Hokkien loon pia) is a Southeast Asian family of fresh and fried spring rolls, especially Filipino lumpiang shanghai and sariwa and Indonesian lumpia semarang, derived from Fujianese spring-pancake traditions.
Lumpy skin disease
Lumpy skin disease (LSD), a Capripoxvirus disease of cattle and water buffalo spread by biting insects; not zoonotic. Morbidity 10-20%, mortality 1-5%; spread from Africa to Europe, Asia; 2025 EU outbreaks in Italy, France, Spain.
Lums Pond State Park
Lums Pond State Park, in Bear, New Castle County, Delaware, centers on Lums Pond, the state's largest freshwater pond at 200 acres. Created as a millpond in the 1730s and later feeding the C&D Canal's Summit lock, the 1,790-acre park opened in 1966 with camping, trails, boating, and a treetop adventure course.
Lumumba (film)
Lumumba is Raoul Peck's 2000 political thriller biopic of Congo's first Prime Minister Patrice Lumumba, starring Eriq Ebouaney, shot for $4 million in Zimbabwe, Mozambique, and Belgium; distinct from Peck's 1991 documentary Death of a Prophet.
Lumumba Government
The Lumumba Government was the first government of the independent Republic of the Congo, headed by Prime Minister Patrice Lumumba from June 30 to September 5, 1960.
Lumumba Vea
Lumumba Vea (Michel Nkuka Mboladinga), "Lumumba Lives", DR Congo's living-statue superfan who stands motionless with raised arm at matches since 2013, honoring Patrice Lumumba; viral at AFCON and the 2026 World Cup.
Lumut SEV power station
The Lumut SEV power station is a 1,303 MW natural gas-fired combined-cycle plant at Segari, near Lumut in Perak, Malaysia, operating since 1996 and owned by Malakoff Corporation.