All articles starting with L
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Lower limb hypertrophy
Lower limb hypertrophy (ORPHA:295051, ICD-11 LB97.3) is a rare genetic, non-syndromic embryonic developmental disorder causing unilateral or bilateral overgrowth of leg bones and/or soft tissues, distinguished from Klippel-Trénaunay syndrome and macrodystrophia lipomatosa.
Lower limb varicose veins
Lower limb varicose veins: dilated, tortuous subcutaneous leg veins with reversed flow from valve incompetence and venous hypertension. Affect up to a third of people; treated by endothermal ablation, foam sclerotherapy, surgery, or compression hosiery.
Lower Mackenzie
Lower Mackenzie (FEOW ecoregion 105) is a Nearctic polar-freshwaters ecoregion in Canada covering the lower Mackenzie River, Great Bear Lake, and tributaries such as the Liard, draining to the Arctic Ocean, with 38 fish species from Beringian and Mississippian refugia.
Lower Mainland
Lower Mainland: region of mainland British Columbia comprising Metro Vancouver and Fraser Valley regional districts, centered on the lower Fraser River delta; over 60% of BC's population, mild marine climate, founded as a Crown colony in 1858.
Lower Manhattan
Lower Manhattan, also called Downtown Manhattan, is the southern part of Manhattan, New York City, generally defined as everything below Houston Street, and one of the largest business districts in the United States.
Lower mass gap
The lower mass gap is a hypothesized scarcity of compact objects with masses between roughly 2.5 and 5 solar masses, between the heaviest neutron stars and lightest black holes.
Lower Merion High School
Lower Merion High School is a public 9-12 school in Ardmore, Pennsylvania, founded 1894 in the Lower Merion School District. Known for Kobe Bryant's basketball career, about 95% college-going graduates, and top Pennsylvania rankings.
Lower Mississippi
Lower Mississippi: the 1,535-km unimpounded reach of the Mississippi River from the Ohio River confluence at Cairo, Illinois to the Gulf of Mexico; heavily leveed floodplain, over 90% floodplain loss, delta restoration efforts.
Lower Monumental Dam
Lower Monumental Dam is a 810 MW run-of-river dam on the Snake River near Kahlotus, Washington, operated by the U.S. Army Corps of Engineers and completed in 1969.
Lower Mortlock Islands - Ettal Atoll
Lower Mortlock Islands - Ettal Atoll, or Ettal (Etal), is a small triangular atoll in the Nomoi (Mortlock) Islands, Chuuk State, Federated States of Micronesia, at 5°34'N 153°35'E, with a closed lagoon, about 15 islets, and 672 residents in 2010.
Lower Mortlock Islands - Lukunor Atoll
Lower Mortlock Islands - Lukunor Atoll (Nomoi Islands) is a region of Chuuk State, Federated States of Micronesia: an 18-islet atoll of 2.82 km2 about 264 km southeast of Chuuk, with 1,432 residents, low 3–5 m elevation, and a history of typhoon and high-tide flooding.
Lower Mortlock Islands - Satowan Atoll
Satowan Atoll, also spelled Satawan, is an atoll in the Lower Mortlock Islands, Chuuk State, Micronesia, sighted by the British in 1795 and named after Captain James Mortlock.
Lower motor neuron
Lower motor neuron: the cholinergic neurons of the spinal cord ventral horn and brainstem motor nuclei whose axons innervate skeletal muscle; Sherrington's final common pathway, forming motor units, with flaccid weakness, hyporeflexia, fasciculations, and atrophy when damaged.
Lower Navarre
Lower Navarre (Basse-Navarre, Nafarroa Beherea), the north-of-Pyrenees part of the kingdom of Navarre, also called Ultrapuertos; independent after 1512, united with France 1589/1620, dissolved 1789, now in Pyrénées-Atlantiques.
Lower Niger - Benue
Lower Niger - Benue (FEOW ecoregion 505): freshwater ecoregion covering the Benue basin and the lower and middle Niger from below Tombouctou to the Niger Delta, with about 202 fish species, 17 endemics, biannual black and white floods, and Kainji and Jebba dam regulation.
Lower Nile
Lower Nile (FEOW ecoregion 523) is a xeric freshwater ecoregion spanning the Nile from Khartoum to the Nile Delta across Egypt, Sudan, Eritrea, and Ethiopia; no endemic fish, vulnerable conservation status, Priority Class V.
Lower of cost or market
Lower of cost or market (LCM) is a US GAAP inventory valuation rule requiring inventory to be carried at the lower of its historical cost and market value.
Lower Paleolithic
Lower Paleolithic: earliest division of the Old Stone Age, about 2.5 million to 150,000-200,000 years ago, defined by Oldowan flake tools and Acheulean handaxes of Homo habilis and Homo erectus.
Lower Parana
Lower Parana, FEOW freshwater ecoregion 345 (Bajo Paraná), the lower Paraná River drainage below Itaipú Dam and Guaíra Falls across Argentina, Paraguay, and Uruguay; temperate floodplain rivers and wetlands with 53 endemic fish species ending in the Río de la Plata delta.
Lower Peninsula of Michigan
The Lower Peninsula of Michigan is the state's larger, mitten-shaped peninsula, bounded by Lakes Michigan, Huron, and Erie and by Indiana and Ohio. It sits atop the Michigan basin, was shaped by Wisconsinan glaciation, and holds about 90 percent of Michigan's population.
Lower respiratory tract infection
Lower respiratory tract infection (LRTI): infection below the larynx, covering bronchitis, bronchiolitis, pneumonia, and tracheitis. Viral or bacterial; 2.4 million global deaths in 2019; major antimicrobial resistance burden.
Lower Rio Grande - Bravo
Lower Rio Grande - Bravo is a freshwater ecoregion, FEOW number 135, covering the lower Rio Grande basin from the Río Conchos confluence to the Gulf of Mexico.
Lower Saxony
Lower Saxony (Niedersachsen), German federal state founded 1 November 1946 by British Regulation No. 55 from Hannover, Oldenburg, Braunschweig, and Schaumburg-Lippe; capital Hannover, second-largest by area, fourth by population.
Lower segment cesarean section
Lower segment cesarean section (LSCS) is a surgical childbirth procedure delivering the baby through an incision in the lower uterine segment, the standard incision in modern obstetrics.
Lower Silesian Voivodeship
Lower Silesian Voivodeship (województwo dolnośląskie, Dolny Śląsk) is a Polish voivodeship in the country's south-west, capital Wrocław, bordering Germany and Czechia; 19,947 km², about 2.87 million people, 67.1% urban, Poland's most urbanized region.
Lower Tier Aviator
Lower Tier Aviator is a family of investment vehicles, chiefly Lower Tier Aviator DC REIT, LLC, a Delaware company in Boca Raton, Florida, that filed a Form D in January 2024.
Lower Tigris & Euphrates
Lower Tigris & Euphrates is a freshwater ecoregion covering the lower Tigris and Euphrates rivers, the Mesopotamian floodplain of Iraq and adjacent Iran, Syria, Turkey, and Kuwait.
Lower urinary tract symptoms
Lower urinary tract symptoms (LUTS): storage, voiding, and post-micturition symptoms from bladder, prostate, or urethral disease; affect 50–75% of men over 50; graded by IPSS; managed conservatively, with drugs, or surgery.
Lower Uruguay
Lower Uruguay (FEOW ecoregion 332), freshwater ecoregion of the lower Río Uruguay basin across Brazil, Argentina, and Uruguay, from Yucumã Falls to the Río de la Plata; 270,190 km², at least 295 fish species with 37 endemics, shaped by Salto Grande dam and seasonal floods.
Lower Valley of the Awash
Lower Valley of the Awash: Ethiopian UNESCO World Heritage site (inscribed 1980, criteria ii, iii, iv) in the Afar Depression, 300 km northeast of Addis Ababa; paleoanthropological site of Hadar where Lucy (Australopithecus afarensis, 3.2 million years old) was found in 1974.