| L | Leŭcino = L | Leucine | In English = L | Leucina | In Catalan = L | Leucin | In Danish = L | Leucin | In German = L | Leucina | In Spanish = L | Leucine | In French = L | 류신 | In Korean = L | Leucin | In Croatian = L | Leusin | In Indonesian = L | Leucina | In Italian = L | לאוצין | In Hebrew = L | Leicīns | In Latvian = L | Leucin | In Letzeburgesh = L | Leucinas | In Lithuanian = L | Leucine | In Dutch = L | ロイシン | In Japanese = L | Leucin | In Norwegian = L | Leucyna | In Polish = L | Leucina | In Portuguese = L | Лейцин | In Russian = L | Leusiini | In Finnish = L | Leucin | In Swedish = L | Lösin | In Turkish = L | Лейцин | In Ukrainian = L | 亮氨酸 | In Chinese |
In Esperanto | → Biochemistry, biophysics |
| L | 류신 = (look above) |
In Korean | → Biochemistry, biophysics |
| L | Leucin = (look above) |
In Croatian | → Biochemistry, biophysics |
| L | Leusin = (look above) |
In Indonesian | → Biochemistry, biophysics |
| L | Leucina = (look above) |
In Italian | → Biochemistry, biophysics |
| L | Leucina = (look above) |
In Spanish | → Biochemistry, biophysics |
| L | Leicīns = (look above) |
In Latvian | → Biochemistry, biophysics |
| L | Leucin = (look above) |
In Letzeburgesh | → Biochemistry, biophysics |
| L | Leucinas = (look above) |
In Lithuanian | → Biochemistry, biophysics |
| L | ロイシン = (look above) |
In Japanese | → Biochemistry, biophysics |
| L | Leucin = (look above) |
In Swedish | → Biochemistry, biophysics |
| L | לאוצין = (look above) |
In Hebrew | → Biochemistry, biophysics |
| L | Lösin = (look above) |
In Turkish | → Biochemistry, biophysics |
| L | 亮氨酸 = (look above) |
In Chinese | → Biochemistry, biophysics |
| L | Лейцин = (look above) |
In Ukrainian | → Biochemistry, biophysics |
| L | Leusiini = (look above) |
In Finnish | → Biochemistry, biophysics |
| LACE | Laboratoire d'Application de la Chimie à l'Environnement | In French | → Research institutes → Nature → Environment, environmental sciences → Chemistry |
| LACIS | Leipzig Aerosol Cloud Interaction Simulator | In English | → Meteorology, climatology |
| LADA | Land Degradation Assessment in Drylands | In English | → Nature → Environment, environmental sciences → Earth sciences |
| LAEPSI | Laboratoire d'Analyse Environnementale des Procédés et des Systèmes Industriels | In French | → Research institutes → Nature → Environmental technology, water supply, waste management |
| LaFoc | Laser Focus | In English | → Serial publications, periodicals → Physics |
| LAGEOS | Laser Geodynamic Satellite | In English | → Earth sciences → Spaceflight engineering, astronautics |
| LAGEOS | Laser Geodynamics Satellite | In English | → Geophysics → Spaceflight engineering, astronautics |
| LAI | Latex Agglutination Assay | In English | → Biochemistry, biophysics |
| LAIRT | Large-Aperture Infrared Telescope | In English | → Astronomy |
| LAMCOS | Laboratoire de Mécanique des Contacts et des Solides | In French | → Research institutes → 531 |
| LAMMR | Large-Antenna Multichannel Microwave Radiometer | In English | → Astronomy |
| LAMP | Lyman-Alpha Mapping Project | In English | → Astronomy |
| LaPhy | Laser Physics | In English | → Serial publications, periodicals → Physics |
| LAPP | Laboratoire d’Annecy-le-Vieux de Physique des Particules | In French | → Research institutes → Nuclear, atomic, and molecular physics |
| LAPSS | Large-Area Pulse Solar Simulator | In English | → Astronomy |
| LAREG | Laboratoire de Recherche en Géodésie | In French | → Research institutes → Geodesy, cartography |
| LASA | Laboratory Animal Science Association (www.lasa.co.uk) | In English | → Associations → Zoology → Veterinary medicine |
| LASCO | Large Angle Spectrometric Coronograph | In English | → Solar system → Analytical chemistry |
| LASER | Lum-Amplifo per Stimulata Eligo de Radioj | In Esperanto | → Electromagnetism |
| LASER | Light Amplification by Stimulated Emission of Radiation | In English | → Physics → Engineering, technology |
| LasJ | Laser Journal | In English | → Serial publications, periodicals → Physics |
| LASS | Large-Amplitude Space Simulator | In English | → Astronomy → Spaceflight engineering, astronautics |
| LC-MS | Liquid Chromatography-Mass Spectrometry | In English | → Chemistry |
| LCC | Laboratoire de Chimie de Coordination | In French | → Research institutes → Chemistry |
| LCM | Least Common Multiple | In English | → Mathematics |
| LCMV | Lymphocytic Choriomeningitis Virus | In English | → Virology |
| LCROSS | Lunar Crater Observation and Sensing Satellite | In English | → Astronomy → Spaceflight engineering, astronautics |
| LDA | Local Density Approximation | In English | → Atomic physics |
| LDH | Lactate Dehydrogenase | In English | → Enzymes |
| LDL | Low-Density Lipoprotein | In English | → Biochemistry, biophysics |
| LDL | Low Density Lipoprotein | In English | → Biochemistry, biophysics |
| LDLR | Low-Density Lipoprotein Receptor | In English | → Biochemistry, biophysics |
| LEBM | Laboratoire Européen de Biologie Moléculaire | In French | → Research institutes → Biochemistry, biophysics |
| LEDSS | Laboratoire d'Études Dynamiques et Structurales de la Sélectivité | In French | → Research institutes → Chemistry → Biochemistry, biophysics |
| LEFM | Linear Elasticity Fracture Mechanics | In English | → Physics |
| LEGMA | Latvian Environment, Geological and Meterological Agency | In English | → Nature → Environment, environmental sciences → Earth sciences → Meteorology, climatology |
| LEM | Lunar Excursion Module | In English | → Planets and satellites → Spaceflight engineering, astronautics |
| LEND | Lunar Exploration Neutron Detector | In English | → Astronomy |
| LEO | Low Earth Orbit | In English | → Astronomy → Spaceflight engineering, astronautics |
| LEP | Large Electron Positron collider | In French | → Nuclear, atomic, and molecular physics |
| LERec | L'Écho des Recherches | In French | → Serial publications, periodicals |
| LFCC | Laboratoire Franco-Chinois sur la Catalyse | In French | → Research institutes → Chemistry → Chemical technology |
| LGE | Laboratoire de Géochimie des Eaux | In French | → Research institutes → Geochemistry → Hydrology |
| LGGE | Laboratoire de Glaciologie et Géophysique de l'Environnement | In French | → Research institutes → Earth sciences |
| LGIT | Laboratoire de Géophysique Interne et de Tectonophysique | In French | → Research institutes → Geophysics → Seismology, earthquakes |
| LGL | Lethal Giant Larvae | In English | → Zoology |
| LGRB | Landesamt für Geologie, Rohstoffe und Bergbau | In German | → Regional administration → Earth sciences → Mining |
| LH | Luteinizing Hormone | In English | → Hormones → Gynaecology |
| LHC | Large Hadron Collider | In French | → Nuclear, atomic, and molecular physics |
| LHC | Left-Hand Circular | In English | → Optics |
| LHCP | Left-Hand Circular Polarization | In English | → Optics |
| LHMT | Letters Heat Mass Transfer | In English | → Serial publications, periodicals → Thermodynamics |
| Li | Litium = Li | Litium | In Afrikaans = Li | ليثيوم | In Arabic = Li | Litiu | In Asturian = Li | Літый | In Belarusian = Li | Литий | In Bulgarian = Li | লিথিয়াম | In Bengali = Li | Litijum | In Bosnian = Li | Liti | In Catalan = Li | Litiu | In Corsican = Li | Lithium | In Czech = Li | Лити | In Chuvash = Li | Lithiwm | In Welsh = Li | Lithium | In Danish = Li | Lithium | In German = Li | Λίθιο | In Greek = Li | Lithium | In English = Li | Litio | In Esperanto = Li | Litio | In Spanish = Li | Liitium | In Estonian = Li | Litio | In Basque = Li | لیتیوم | In Persian = Li | Litium | In Finnish = Li | Liti | In Friulian = Li | Litiam | In Irish = Li | Litio | In Galician = Li | ליתיום | In Hebrew = Li | लिथियम | In Hindi = Li | Litij | In Croatian = Li | Lityòm | In Haitian Creole = Li | Lítium | In Hungarian = Li | Լիթիում | In Armenian = Li | Litium | In Indonesian = Li | Litio | In Ido = Li | Litín | In Icelandic = Li | Litio | In Italian = Li | リチウム | In Japanese = Li | roksodna | In Lojban = Li | ლითიუმი | In Georgian = Li | 리튬 | In Korean = Li | Lithium | In Kölsch = Li | Lîtyûm | In Kurdish = Li | Lithium | In Latin = Li | Lithium | In Letzeburgesh = Li | Litis | In Lithuanian = Li | Litijs | In Latvian = Li | Литиум | In Macedonian = Li | ലിഥിയം | In Malayalam = Li | Litium | In Malay = Li | Lithium | In Low German = Li | Lithium | In Dutch = Li | Litium | In Nynorsk = Li | Liti | In Occitan = Li | Lit | In Polish = Li | Lítio | In Portuguese = Li | Lityu | In Quechua = Li | Litiu | In Romanian = Li | Литий | In Russian = Li | लिथियम | In Sanskrit = Li | Litij | In Serbo-Croatian = Li | Lítium | In Slovak = Li | Litij | In Slovenian = Li | Litiumi | In Albanian = Li | Литијум | In Serbian = Li | Litium | In Swedish = Li | Lithi | In Swahili = Li | லித்தியம் | In Tamil = Li | ลิเทียม | In Thai = Li | Lityum | In Turkish = Li | Літій | In Ukrainian = Li | Litiy | In Uzbek = Li | Liti | In Vietnamese = Li | Litiom | In Walloon = Li | ליטיום | In Yiddisch = Li | 锂 | In Chinese |
In Norwegian | → Chemistry |
| Li | Литијум = (look above) |
In Serbian | → Chemistry |
| Li | Litiumi = (look above) |
In Albanian | → Chemistry |
| Li | Litij = (look above) |
In Slovenian | → Chemistry |
| Li | Lítium = (look above) |
In Slovak | → Chemistry |
| Li | Litij = (look above) |
In Serbo-Croatian | → Chemistry |
| Li | लिथियम = (look above) |
In Sanskrit | → Chemistry |
| Li | Литий = (look above) |
In Russian | → Chemistry |
| Li | Litiu = (look above) |
In Romanian | → Chemistry |
| Li | Lityu = (look above) |
In Quechua | → Chemistry |
| Li | Lítio = (look above) |
In Portuguese | → Chemistry |
| Li | Liti = (look above) |
In Occitan | → Chemistry |
| Li | Lit = (look above) |
In Polish | → Chemistry |
| Li | Lithi = (look above) |
In Swahili | → Chemistry |
| Li | Lithium = (look above) |
In Danish | → Chemistry |
| Li | Litium = (look above) |
In Swedish | → Chemistry |
| Li | 锂 = (look above) |
In Chinese | → Chemistry |
| Li | ליטיום = (look above) |
In Yiddisch | → Chemistry |
| Li | Litiom = (look above) |
In Walloon | → Chemistry |
| Li | Liti = (look above) |
In Vietnamese | → Chemistry |
| Li | Litiy = (look above) |
In Uzbek | → Chemistry |
| Li | Літій = (look above) |
In Ukrainian | → Chemistry |
| Li | Lityum = (look above) |
In Turkish | → Chemistry |
| Li | ลิเทียม = (look above) |
In Thai | → Chemistry |
| Li | லித்தியம் = (look above) |
In Tamil | → Chemistry |
| Li | ליתיום = (look above) |
In Hebrew | → Chemistry |
| Li | Litium = (look above) |
In Nynorsk | → Chemistry |
| Li | Litium = (look above) |
In Afrikaans | → Chemistry |
| Li | Λίθιο = (look above) |
In Greek | → Chemistry |
| Li | Lithium = (look above) |
In English | → Chemistry |
| Li | Litio = (look above) |
In Esperanto | → Chemistry |
| Li | Litio = (look above) |
In Spanish | → Chemistry |
| Li | Liitium = (look above) |
In Estonian | → Chemistry |
| Li | Litio = (look above) |
In Basque | → Chemistry |
| Li | لیتیوم = (look above) |
In Persian | → Chemistry |
| Li | Litium = (look above) |
In Finnish | → Chemistry |
| Li | Liti = (look above) |
In Friulian | → Chemistry |
| Li | Litiam = (look above) |
In Irish | → Chemistry |
| Li | Lithium = (look above) |
In German | → Chemistry |
| Li | Lithiwm = (look above) |
In Welsh | → Chemistry |
| Li | ليثيوم = (look above) |
In Arabic | → Chemistry |
| Li | Litiu = (look above) |
In Asturian | → Chemistry |
| Li | Літый = (look above) |
In Belarusian | → Chemistry |
| Li | Литий = (look above) |
In Bulgarian | → Chemistry |
| Li | লিথিয়াম = (look above) |
In Bengali | → Chemistry |
| Li | Litijum = (look above) |
In Bosnian | → Chemistry |
| Li | Liti = (look above) |
In Catalan | → Chemistry |
| Li | Litiu = (look above) |
In Corsican | → Chemistry |
| Li | Lithium = (look above) |
In Czech | → Chemistry |
| Li | Лити = (look above) |
In Chuvash | → Chemistry |
| Li | Litio = (look above) |
In Galician | → Chemistry |
| Li | लिथियम = (look above) |
In Hindi | → Chemistry |
| Li | Lîtyûm = (look above) |
In Kurdish | → Chemistry |
| Li | Lithium = (look above) |
In Latin | → Chemistry |
| Li | Lithium = (look above) |
In Letzeburgesh | → Chemistry |
| Li | Litis = (look above) |
In Lithuanian | → Chemistry |
| Li | Litijs = (look above) |
In Latvian | → Chemistry |
| Li | Литиум = (look above) |
In Macedonian | → Chemistry |
| Li | ലിഥിയം = (look above) |
In Malayalam | → Chemistry |
| Li | Litium = (look above) |
In Malay | → Chemistry |
| Li | Lithium = (look above) |
In Low German | → Chemistry |
| Li | Lithium = (look above) |
In Dutch | → Chemistry |
| Li | Lithium = (look above) |
In Kölsch | → Chemistry |
| Li | 리튬 = (look above) |
In Korean | → Chemistry |
| Li | ლითიუმი = (look above) |
In Georgian | → Chemistry |
| Li | Litij = (look above) |
In Croatian | → Chemistry |
| Li | Lityòm = (look above) |
In Haitian Creole | → Chemistry |
| Li | Lítium = (look above) |
In Hungarian | → Chemistry |
| Li | Լիթիում = (look above) |
In Armenian | → Chemistry |
| Li | Litium = (look above) |
In Indonesian | → Chemistry |
| Li | Litio = (look above) |
In Ido | → Chemistry |
| Li | Litín = (look above) |
In Icelandic | → Chemistry |
| Li | Litio = (look above) |
In Italian | → Chemistry |
| Li | リチウム = (look above) |
In Japanese | → Chemistry |
| Li | roksodna = (look above) |
In Lojban | → Chemistry |
| LicOB | Lick Observatory Bulletin | In English | → Serial publications, periodicals → Astronomy |
| LiDAR | Light Detection And Ranging | In English | → Physics |
| LIFE | L'Instrument Financier pour l'Environnement | In French | → International relations → European Union → Nature → 50 |
| LIM | Laboratoire d'Ingénierie Mathématique | In French | → Research institutes → Mathematics |
| LINE | Long Interspersed Nuclear Element | In English | → Genetics |
| LIPS | Laser-Induzierte Plasma Spektroskopie | In German | → Plasma physics |
| LIS | Lightning Imaging Sensor | In English | → Meteorology, climatology |
| LISA | Life Science Austria | In English | → Biological sciences → Medicine |
| LLI | Laser Induced Incandescence | In English | → Electromagnetism |
| LLO | Low Lunar Orbit | In English | → Astronomy → Spaceflight engineering, astronautics |
| LLT | Language Learning and Technology Journal (http://llt.msu.edu) | In English | → 50 → Education → Language, linguistics, literature |
| LM&SS | Lunar Mapping and Scientific Survey | In English | → Astronomy → Spaceflight engineering, astronautics |
| LMAM | Levenberg Marquardt with Adaptive Momentum | In English | → Mathematics |
| LMaPh | Letters in Mathematical Physics | In English | → Serial publications, periodicals → Mathematics → Physics |
| LMC | Lipid Matrix Carrier | In English | → Biochemistry, biophysics |
| LMC3O | Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique | In English | → Research institutes → Chemistry |
| LMD | Laboratoire de Météorologie Dynamique | In French | → Research institutes → Meteorology, climatology |
| LMD | Large Mirror Development | In English | → Optics |
| LMFA | Laboratoire de Mécanique des Fluides et d’Acoustique | In French | → Research institutes → 5325 → Aerodynamics → Physics |
| LMI | Laboratory of Molecular Imaging | In English | → Research institutes → Biochemistry, biophysics |
| LMS | Least Mean-Square | In English | → Mathematics |
| LMSS | Lunar Mapping and Survey System | In English | → Astronomy → Spaceflight engineering, astronautics |
| LNES | Lecture Notes in Earth Sciences, Berlin Springer Verlag | In English | → Serial publications, periodicals → Earth sciences |
| LNM | Lecture Notes in Mathematics, Berlin Springer Verlag | In English | → Serial publications, periodicals → Mathematics |
| LNP | Lecture Notes in Physics, Berlin Springer Verlag | In English | → Serial publications, periodicals → Physics |
| LNPAM | Lecture Notes in Pure and Applied Mathematics | In English | → Serial publications, periodicals → Mathematics |
| LNSP | Lecture Notes and Supplements in Physics | In English | → Serial publications, periodicals → Astronomy |
| LNV | Ministerie van Landbouw, Natuur en Voedselkwaliteit (www.minlnv.nl) | In Dutch | → Central administration → Agricultural sciences → Nature and society |
| LO | Local Orbitals | In English | → Atomic physics |
| LOBPCG | Locally Optimal Block Preconditioned Conjugate Gradient | In English | → Mathematics |
| LOCI | Laboratory for Optical and Computational Instrumentation | In English | → Research institutes → Optics → Computer science |
| LOI | Lunar Orbit Insertion | In English | → Astronomy → Spaceflight engineering, astronautics |
| LOICZ | Land-Ocean Interactions in the Coastal Zone | In English | → Marine research, oceanography |
| LOR | Lunar Orbit Rendezvous | In English | → Astronomy → Spaceflight engineering, astronautics |
| LowOB | Lowell Observatory Bulletin | In English | → Serial publications, periodicals → Astronomy |
| LPA | Lysophosphatidic Acid | In English | → 5771 |
| LPB | Laser and Particle Beams | In English | → Serial publications, periodicals → Physics |
| LPD | List of Physical Dimensions | In English | → Physics → Engineering, technology |
| LPES | Laboratoire de Physique Électronique des Solides | In French | → Research institutes → 53912 |
| LPICo | unar and Planetary Institute Contributions | In English | → Serial publications, periodicals → Planets and satellites |
| LPL | Laboratoire de Physique des Lasers | In French | → Research institutes → Magnetism |
| LPLWS | Launch Pad Lightning Warning System | In English | → Meteorology, climatology → Spaceflight engineering, astronautics |
| LPM | Laboratoire de Physique de la Matière | In French | → Research institutes → 539 |
| LPMC | Laboratoire de Physique de la Matière Condensée (http://pmc.polytechnique.fr) | In French | → Research institutes → Physics of condensed matter |
| LPMTM | Laboratoire des Propriétés Mécaniques et Thermodynamiques des Matériaux | In French | → Research institutes → 531 → Thermodynamics |
| LPS | Lipopolysaccharide | In English | → Biochemistry, biophysics |
| LPS | Lipopolysaccharide | In French | → Biochemistry, biophysics |
| LRO | Lunar Reconnaissance Orbiter | In English | → Astronomy → Spaceflight engineering, astronautics |
| LRO | Large Radio Observatory | In English | → Observatories |
| LRR | Living Reviews in Relativity | In English | → Serial publications, periodicals → Physics |
| LRSP | Living Reviews in Solar Physics | In English | → Serial publications, periodicals → Astronomy → Physics |
| LRTAP | Long-range Transboundary Air Pollution | In English | → Meteorology, climatology |
| LS/ST | Light Shield/Star Tracker | In English | → Astronomy |
| LSCE | Laboratoire des Sciences du Climat et de l'Environnement | In French | → Environment, environmental sciences → Meteorology, climatology |
| LSD | Lysergic Acid Diethylamide | In English | → Biochemistry, biophysics |
| LSDA | Local Spin Density Approximation | In English | → Atomic physics |
| LSGC | Laboratoire des Sciences du Génie Chimique | In French | → Research institutes → Chemistry → Chemical technology |