| l band ... La Follette, Philip Fox |
| La Follette, Robert M ... La Pampa, University of |
| La Paz ... La Tremoille Family |
| La Tremoille, Claude de ... labial vowel harmony |
| Labiche, Eugene-Marin ... Labour, Party of |
| labour-cost model ... Lacerta |
| lacewing ... lactation |
| lacteal ... Ladino language |
| Ladipo, Duro ... Lafferty, R A |
| Laffite, Jean ... Lagrange's equations |
| Lagrange's theorem on finite groups ... Laine, Dame Cleo |
| Laine, Frankie ... Lake Placid Olympics |
| Lake Plateau ... Laksmana |
| Laksmana era ... lamb |
| Lamb shift ... Lambing Flat Riots |
| lambkill ... Lamont, Johann von |
| Lamont, Thomas William ... Lancaster |
| Lancaster ... land breeze |
| land bridge ... Lander |
| Lander ... Landsberger, Benno |
| landscape ... Lang, Matheson |
| Lang, Matthaus ... Langmuir circulation |
| Langmuir, Alexander ... lanosterol |
| Lanoye, Tom ... Lao language |
| Lao Lishi ... Laplace's equation |
| Laplace, Pierre-Simon, marquis de ... lard |
| lard oil ... Larkana |
| Larkana ... Las Alpujarras |
| Las Bela ... Lasiopodomys brandtii |
| Lasius ... Late Archaic Chinese language |
| Late Archean Era ... Later Paekche |
| Later Palace Period ... Latimer, William |
| Latimeria chalumnae ... Latrobe |
| Latrobe River ... Lauds |
| Laue diffraction pattern ... Laurens |
| Laurens, Henri ... lava cave |
| lava flow ... law merchant |
| Law of Associations ... Lawrence, Saint |
| Lawrence, Sir Henry Montgomery ... laying house |
| laysan albatross ... Le Dang Doanh |
| Le Duan ... Le Van Duyet |
| Le Vau, Louis ... leading indicator |
| leading note ... Leahy, Frank |
| Leahy, William Daniel ... least sandpiper |
| least seedsnipe ... Leblanc process |
| Leblanc, Maurice ... Leclercq, Patrick |
| LeClercq, Tanaquil ... Lee, Ann |
| Lee, Arthur ... Leeds and Liverpool Canal |
| Leeds, Thomas Osborne, 1st Duke of, Marquess of Carmarthen, Earl of Danby, Viscount Latimer of Danby, Viscount Osborne of Dunblane, Baron Osborne of Kiveton ... legacy |
| legal aid ... Legionella pneumophila |
| Legionnaire disease ... Lehmann, Caspar |
| Lehmann, Henri ... Leigh, George |
| Leigh, Janet ... leitmotiv |
| Leitner, Patric ... Lemery, Nicolas |
| Lemkin, Raphael ... Lenghu |
| Lenglen, Suzanne ... Lenox, James |
| Lenox, Walter Scott ... Leo VI |
| Leo VI ... Leonidas II |
| Leonidas of Tarentum ... Leopold of Hohenzollern-Sigmaringen |
| Leopold of Kothen ... leprosy |
| Lepsi River ... Lernet-Holenia, Alexander |
| Leros ... Lesotho, history of |
| Lesothosaurus ... Lester Patrick Trophy |
| Lester, Richard ... leucine |
| Leucippus ... levee |
| levee en masse ... Levinas, Emmanuel |
| Levine, Beth ... Lewald, Fanny |
| Lewan ... Lewis, Jerry |
| Lewis, Jerry Lee ... Lex Luthor |
| Lex Oppia ... Lhote, Henri |
| Lhotse ... Li Xiannian |
| Li Ximing ... Liapchev, Andrei |
| Liaquat Ali Khan ... Liberal Party of Australia |
| Liberal Party of Canada ... Liberty Bloc |
| Liberty engine ... license |
| license and permit bond ... Lie, Trygve (Halvdan) |
| Liebeault, Ambroise-Auguste ... Lifan Yuan |
| Lifar, Serge ... ligand isomerism |
| ligand-field splitting energy ... Lighthill, Sir James |
| lighthouse ... Lilburn, Douglas Gordon |
| Lilburne, John ... Lima, Jose |
| Lima, Manuel dos Santos ... Limerick lace |
| Limerick, Treaty of ... Limosin, Leonard |
| Limousin ... Lincoln Trail |
| Lincoln Tunnel ... Lindos |
| Lindqvist, John Ajvide ... lineament |
| Linear A and Linear B ... linecut |
| lined tiger heron ... Linh Peak |
| Linhai Industrial Park ... linosamide |
| Linospadix ... Liouville, Joseph |
| lip ... Lippia |
| Lippia canescens ... liquid-drop model |
| liquid-ion-exchanger electrode ... Liss, Johann |
| Lissa, Battle of ... Literary Research Association |
| Literary Revolution ... lithostatic pressure |
| lithotroph ... Little Colorado River |
| little crake ... Little Theatre |
| Little Tobago ... Liu Haisu |
| Liu Heita ... liver |
| liver cancer ... Livingstone Falls |
| Livingstone Mountains ... Llano Estacado |
| Llano Zapata, Jose Eusebio de ... Lo Schiavo, Francesca |
| Lo-Johansson, Ivar ... Lobmeyr, Ludwig |
| Lobo, Rebecca ... Locarno International Film Festival |
| Locarno, Pact of ... locomotion |
| locomotive ... Loewi, Otto |
| Loewy, Raymond ... Logic Theorist |
| logic, history of ... loi cadre |
| Loi-kaw ... Lombard |
| Lombard kingdom ... London English |
| London Eye ... Long Beach |
| Long Beach ... long-beaked echidna |
| long-beaked spider crab ... long-term warning system |
| long-toed lapwing ... longitudinal muscle |
| longitudinal nerve cord ... longyis |
| Lonhro PLC ... Lope National Park |
| Lopes de Castanheda, Fernao ... Lophosteus |
| Lophotes ... Loren, Sophia |
| Lorengar, Pilar ... Los Alamos |
| Los Alamos National Laboratory ... Lost Colony |
| Lost Generation ... Loubet, Emile |
| Loubomo ... Louis VII |
| Louis VIII ... louse fly |
| lousewort ... Lovell Telescope |
| Lovell, Francis Lovell, Viscount ... low-energy electron diffraction |
| low-fat milk ... Lower Egypt |
| Lower Engadin ... Loxsoma cunninghamii |
| Loxsomopsis ... Luan River |
| Luanda ... Lucan |
| Lucan, George Charles Bingham, 3rd Earl of ... Lucite |
| Lucius ... Ludlow, Washington I. |
| Ludlul bel nemeqi ... Lugert Dam |
| Lugnaquillia Mountain ... Lukin, Lionel |
| Luks, George ... luminol |
| luminosity ... Lundi River |
| Lundkvist, Artur ... Luo language |
| Luo River ... Lusaka Accord |
| Lusaka Peace Accord ... Lutkens, R. J. |
| Luton ... Luzerne |
| Luzhkov, Yury Mikhaylovich ... Lycoperdaceae |
| Lycoperdon ... Lynceus |
| lynch law ... Lyot, Bernard |
| Lyotard, Jean-Francois ... Lyttelton |
| Lyttelton, George Lyttelton, 1st Baron ... |
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