All articles starting with L

Leukoplakia of vagina

Leukoplakia of vagina (vaginal leukoplakia, ICD-11 GA14.5, ICD-10-CM N89.4) is a white or grey hyperkeratotic plaque of vaginal mucosa caused by HPV, trauma, radiotherapy, or premalignant lesions; a nonspecific finding requiring biopsy.

Leukorrhea

Leukorrhea, also spelled leucorrhoea, is a whitish or yellowish vaginal discharge. It is usually a normal, healthy discharge, but changes in color or odor can signal infection.

Leukotriene

Leukotrienes (LTs), eicosanoid lipid mediators made from arachidonic acid via 5-lipoxygenase, include LTB4, a leukocyte chemoattractant, and the cysteinyl leukotrienes LTC4, LTD4, LTE4, potent bronchoconstrictors targeted by asthma drugs such as montelukast.

Leukotriene A4 hydrolase/leucine aminopeptidase

Leukotriene A4 hydrolase (LTA4H, EC 3.3.2.6) is a human 611-amino-acid bifunctional zinc metalloenzyme: its epoxide hydrolase activity makes pro-inflammatory LTB4, while its aminopeptidase activity degrades the chemoattractant peptide Pro-Gly-Pro.

Leukotriene B4

Leukotriene B4 (LTB4) is an inflammatory lipid mediator made from arachidonic acid by the 5-lipoxygenase pathway and one of the most potent chemoattractants for leukocytes.

Leukotriene B4 receptor

Leukotriene B4 receptor: the GPCRs BLT1 and BLT2 that bind leukotriene B4, an arachidonate-derived chemoattractant. BLT1 is high-affinity and pro-inflammatory; BLT2 is low-affinity, activated by 12-HHT, and protective.

Leukotriene C4

Leukotriene C4 is a cysteinyl leukotriene, formed by conjugating leukotriene A4 with glutathione and first identified as the slow-reacting substance of anaphylaxis; it constricts airways and drives asthma.

Leukotriene E4

Leukotriene E4 is the final and most stable cysteinyl leukotriene, formed from arachidonic acid, that drives bronchoconstriction and whose urinary measurement marks whole-body cysteinyl leukotriene production.

Leukotriene receptors

Leukotriene receptors are G protein-coupled receptors for leukotriene lipid mediators: BLT1 and BLT2 bind LTB4, CysLT1 and CysLT2 bind cysteinyl leukotrienes; CysLT1 antagonists treat asthma.

Leuktron (Greece)

Leuktron (Λεῦκτρον, Leuctra) was an ancient settlement near Stoupa in Messenia, Greece, the Linear B Re-u-ko-to-ro and probable capital of Pylos' Further Province, later one of Pausanias' eighteen Free Laconian cities and site of the Frankish Beaufort castle.

Leuna Refinery

The Leuna Refinery, TotalEnergies Raffinerie Mitteldeutschland, is an oil refinery in Leuna, Saxony-Anhalt, Germany, that can process up to 12 million tonnes of crude oil a year.

Leung Kwok-hung (梁国雄)

Leung Kwok-hung (梁國雄), nicknamed 長毛 (Long Hair), Hong Kong activist and politician; co-founded the League of Social Democrats, represented New Territories East in LegCo 2004–2016, disqualified 2017, sentenced in 2024 to 81 months under the National Security Law.

Leupeptin

Leupeptin (Ac-Leu-Leu-Arg-H, Gabadur) is a cell-permeable tripeptide aldehyde protease inhibitor discovered in 1969 from Streptomyces; it reversibly inhibits serine, cysteine, and threonine peptidases and is used in protein extraction and autophagy assays.

Leuprorelin

Leuprorelin is a synthetic GnRH analog that suppresses sex hormones. Approved by the FDA in 1985, it is used to treat prostate cancer, endometriosis, uterine fibroids, and precocious puberty.

Leuris Pupo

Leuris Pupo (Leuris Pupo Requejo), Cuban sport shooter born 1977 in Holguin, specialist in men's 25m rapid fire pistol; Olympic gold London 2012 (first Cuban shooting gold), silver Tokyo 2020, seven Olympics 2000-2024.

Leusaba

Leusaba (Lausaba in Ravenna) was a Roman road station in northern Illyricum on the Sirmium–Salona road, identified with Mrkonjić Grad, Bosnia and Herzegovina, per Bojanovski 1974 and Pleiades 197350.

Sep 19, 2026

Leusemia

Leusemia is a Peruvian rock band formed in Lima in 1983 by Daniel F, one of the founding bands of the 1980s rock subterráneo movement that reshaped Peruvian popular music.

Leuven

Leuven (Louvain), capital of Flemish Brabant, Belgium: a university city of 105,233 inhabitants (2025), home to KU Leuven founded in 1425, with about 50,000 students and a city-wide climate-neutrality program.

Leuze electronic

Leuze electronic is a German family-owned manufacturer of optical and inductive sensors, identification systems, and safety solutions for industrial automation, founded by the Leuze family in 1963 in Owen, Baden-Württemberg.

Lev Avnerovich Leviev

Lev Avnerovich Leviev (Hebrew: לב לבייב), born 1956, is an Israeli diamond magnate who broke De Beers' monopoly and built the world's largest diamond cutting business.

Lev Balandin

Lev Nikolayevich Balandin (Лев Николаевич Баландин), 1934-1980, Soviet freestyle swimmer; two-time Olympian (1952, 1956), 1954 European silver medalist, and 4x100 m medley relay world record holder.

Oct 10, 2026

Lev Bregman

Lev Meerovich Bregman (Лев Меерович Брегман) was a Soviet and Israeli mathematician who introduced the Bregman divergence, now standard in machine learning, and proved Bregman's theorem on matrix permanents.

Sep 21, 2026

Lev Gor'kov

Lev Petrovich Gor'kov (Лев Горьков; 1929–2016) was a Soviet-born Russian and American theoretical physicist of the Landau school, best known for the Gor'kov equations, which put superconductivity theory on a microscopic footing.

Lev Grossman

Lev Grossman, American novelist and former Time book critic, author of the #1 NYT bestselling Magicians trilogy (The Magicians, The Magician King, The Magician's Land) and the 2024 Arthurian novel The Bright Sword.

Lev Kamenev (Лев Борисович Каменев)

Lev Kamenev (Лев Борисович Каменев), born Rosenfeld, 1883–1936, Bolshevik leader, chairman of the Moscow Soviet and briefly VTsIK, United Opposition figure, executed after the 1936 Moscow show trial.

Lev Kuleshov (Лев Владимирович Кулешов)

Lev Vladimirovich Kuleshov (Лев Владимирович Кулешов, 1899–1970) was a Soviet film director, montage theorist, and VGIK teacher; namesake of the Kuleshov effect and director of By the Law (1926).

Lev Landau (Лев Давидович Ландау)

Lev Davidovich Landau was a Soviet theoretical physicist who won the 1962 Nobel Prize in Physics for his theories of condensed matter, especially liquid helium.