All articles starting with L
25,375 articles
Levittown
Levittown: series of mass-produced postwar planned suburbs by Levitt & Sons, starting on Long Island, NY (Island Trees), 1947-1951, 17,447 homes, 80,000 residents; also Pennsylvania, New Jersey, Maryland; racially exclusionary.
Levittown, New York
Levittown, New York: Levitt & Sons' 1947–1951 tract-housing development on Long Island, 17,447 homes for veterans at $7,000 with FHA mortgages, built by reverse assembly line, racially exclusive by covenant.
Levittown, Pennsylvania
Levittown, Pennsylvania, a planned Bucks County suburb built by William Levitt in the early 1950s for WWII veterans; over 17,000 homes; site of the 1957 Myers family integration crisis; 2020 population 52,699.
Leviviricetes
Leviviricetes, formerly Allassoviricetes, is a class of single-stranded RNA viruses that infect bacteria, expanded by the ICTV in 2021 to include the phage MS2, whose genome was the first ever sequenced.
Lëvizja Shqipëria Bëhet
Lëvizja Shqipëria Bëhet (Albania Becomes Movement, SHB) is an Albanian civic movement turned party, founded in 2023 and led by Adriatik Lapaj; it won one parliamentary seat in the May 2025 election after polling 10.2% nationally.
Levko Lukyanenko
Levko Lukyanenko (Левко Лук'яненко, 1928–2018) was a Ukrainian lawyer, dissident, and politician who spent 27 years in Soviet prisons and exile and drafted Ukraine's 1991 independence declaration.
Levni
Levni, whose real name was Abdülcelil Çelebi, was the leading Ottoman miniaturist of the early 18th century, best known for the Surname-i Vehbi festival book.
LeVo
LeVo is Tencent AI Lab's song-generation model family, which generates full-length songs with vocals and accompaniment from lyrics and descriptive prompts; its open-source SongGeneration series was first released in June 2025.
Levo-Transposition of the great arteries
Levo-transposition of the great arteries (L-TGA, ccTGA) is a rare congenital heart defect with double discordance leaving the right ventricle systemic; over 80% have associated lesions, and heart block, tricuspid regurgitation, and ventricular failure dominate management.
Levobetaxolol
Levobetaxolol is the active S-isomer of the beta blocker betaxolol, given as eye drops to lower intraocular pressure in open-angle glaucoma and ocular hypertension; it debuted in the early 1980s.
Levobunolol
Levobunolol (levobunolol hydrochloride ophthalmic solution) is a noncardioselective topical beta-blocker, distinct from timolol and betaxolol, used once or twice daily to lower intraocular pressure in open-angle glaucoma and ocular hypertension.
Levobupivacaine
Levobupivacaine, sold under the brand name Chirocaine, is a long-acting local anesthetic developed as a safer alternative to bupivacaine, with lower cardiac and central nervous system toxicity.
Levoča, Spišský Hrad and the Associated Cultural Monuments
Levoča, Spišský Hrad and the Associated Cultural Monuments is a UNESCO World Heritage Site in eastern Slovakia grouping the Spiš castle, the historic town of Levoča, and nearby villages.
Levocabastine
Levocabastine, a potent selective second-generation H1 antihistamine (C26H29FN2O2), is a topical eye-drop and nasal-spray treatment for allergic conjunctivitis and rhinitis, first approved around 1990 and now discontinued in many markets.
Levocetirizine
Levocetirizine (Xyzal) is the R-enantiomer of cetirizine, an oral second-generation H1 antihistamine for allergic rhinitis and chronic idiopathic urticaria; 5 mg once daily, renally cleared, FDA 2025 warning on severe post-discontinuation itching.
Levodopa
Levodopa (L-DOPA) is a naturally occurring amino acid and direct precursor of dopamine, converted to dopamine in the brain; it has been the gold-standard therapy for Parkinson's motor symptoms since 1967, usually given with carbidopa.
Levodropropizine
Levodropropizine, the levo (S)-enantiomer of dropropizine, is a non-opioid peripheral antitussive acting on airway C-fibers; used for dry cough in Europe (not US-approved), dosed 60 mg three times daily.
Levofloxacin
Levofloxacin (Cravit, Tavanic, Levaquin) is a third-generation fluoroquinolone antibiotic, the S-(-) isomer of ofloxacin, inhibiting DNA gyrase and topoisomerase IV; FDA-approved 1996 for pneumonia, UTIs, skin infections, anthrax, and plague, with a boxed warning for tendon and nerve injury.
Levoglucosenone
Levoglucosenone (LGO) is a chiral bicyclic ketone with the formula C6H6O3, produced from cellulose by acid-catalyzed pyrolysis and used for polymers, green solvents, and fine chemicals.
Levoketoconazole
Levoketoconazole (Recorlev) is the 2S,4R enantiomer of ketoconazole, an oral cortisol synthesis inhibitor approved by FDA on December 30, 2021 for endogenous hypercortisolemia in adults with Cushing's syndrome, with boxed warnings for hepatotoxicity and QT prolongation.
Levomefolic acid
Levomefolic acid (L-methylfolate, 5-MTHF, Metafolin) is the active form of folate (vitamin B9), 98% of plasma folate, crosses the blood-brain barrier, sold as levomefolate calcium supplements and in oral contraceptives like Safyral.
Levomepromazine
Levomepromazine, also known as methotrimeprazine and sold under names including Nozinan, is a phenothiazine antipsychotic developed by Rhône-Poulenc by the late 1950s, used in psychiatry and palliative care.
Levomethadyl acetate
Levomethadyl acetate (LAAM, levacetylmethadol, ORLAAM), a long-acting full mu-opioid agonist congener of methadone dosed three times weekly for opioid dependence; FDA-approved 1993, withdrawn 2001/2003 over QT prolongation and torsades de pointes.
Levomethamphetamine
Levomethamphetamine, also called levmetamfetamine or l-desoxyephedrine, is the levorotatory isomer of methamphetamine, a weaker CNS stimulant sold over the counter in American nasal decongestant vapor inhalers.
Levomilnacipran
Levomilnacipran (Fetzima), the L-isomer of milnacipran, is a once-daily SNRI antidepressant approved by the FDA in July 2013 for major depressive disorder; NNT 9 for response, notable blood pressure and heart rate increases.
Levon Aronian (Լևոն Գրիգորի Արոնյան)
Levon Aronian (Լևոն Գրիգորի Արոնյան), born 1982 in Yerevan, is an Armenian-American chess grandmaster, two-time World Cup winner, former world No. 2, and peak 2830 rating, fourth-highest in history; US federation since 2021.
Levon Helm
Levon Helm (Mark Lavon Helm, 1940–2012), Arkansas-born drummer and singer of the Band, lead vocalist on "The Weight"; survived throat cancer, hosted Woodstock Midnight Rambles, won three consecutive Grammys late in life.
Levon Julfalakyan
Levon Julfalakyan (Լևոն Ջուլֆալաքյան), born 1964 in Gyumri, Armenian Greco-Roman wrestler; 1988 Seoul Olympic lightweight gold for the USSR, 1986 world and European champion, later Armenia's head coach and 2024 UWW Hall of Fame inductee.
Levon M. Khachigian
Levon M. Khachigian is an Australian molecular biologist at UNSW Sydney known for targeting immediate-early genes in vascular disease and developing the DNAzyme drug Dz13.
Levon Shant
Levon Shant (Լեւոն Շանթ; born Levon Nahashbedian, baptized Levon Seghposian, 1869–1951) was an Armenian playwright, novelist, and educator best known for the acclaimed drama Ancient Gods.