| lymphe | lymph |
| Lymphocyte B | B cell |
| Lymphocyte NK | Natural killer cell |
| Lymphocyte T | T cell |
| lymphocyte T cytotoxique | cytotoxic T cell |
| Lymphome non-hodgkinien | Non-Hodgkin lymphoma |
| Lympne | Lympne |
| lyncher | lynch |
| Lyncodon patagonicus | Patagonian Weasel |
| Lyncée | Lynceus |
| Lynda Lemay | Lynda Lemay |
| Lynde | Linde |
| Lyndon LaRouche | Lyndon LaRouche |
| Lynette Scavo | Lynette Scavo |
| Lyngby BK | Lyngby Boldklub |
| Lyngby-Taarbæk | Lyngby-Taarbæk |
| Lynn Margulis | Lynn Margulis |
| Lynn Okamoto | Lynn Okamoto |
| Lynndie England | Lynndie England |
| lynx | lynx |
| Lynx de Toronto | Toronto Linx |
| Lynx du Canada | Canadian Lynx |
| Lynx du Minnesota | Minnesota Lynx |
| lynx roux | bobcat |
| Lynyrd Skynyrd | Lynyrd Skynyrd |
| Lyoko | Tower |
| Lyon | Lyons |
| Lyon olympique universitaire | Lyon OU |
| Lyonel Feininger | Lyonel Feininger |
| Lyonpo Khandu Wangchuk | Khandu Wangchuk |
| Lyonpo Yeshey Zimba | Lyonpo Yeshey Zimba |
| Lyons Ferry | Lyons Ferry |
| Lyophilisation | Freeze drying |
| lyophiliser | freeze-dry |
| Lyra | Lyra |
| lyre | lyre |
| Lyria | TGV Lyria |
| lyrique | lyrical |
| lyrisme | lyricism |
| lys | lily |
| Lys Assia | Lys Assia |
| Lysandre | Lysander |
| Lysefjord | Lysefjord |
| Lysekloster | Lyse kloster |
| Lysergamide | Lysergamides |
| Lysias | Lysias |
| Lysichiton | Lysichiton |
| Lysichiton américain | Western Skunk Cabbage |
| Lysimachia | Lysimachia |
| Lysimaque | Lysimachus |
| Lysimaque commune | Lysimachia |
| Lysimaque nummulaire | Lysimachia nummularia |
| lysimétrie | lysimetry |
| Lysine | Lysine |
| Lysippe | Lysippos |
| Lysistrata | Lysistrata |
| Lysithéa | Lysithea |
| Lysmata amboinensis | Pacific cleaner shrimp |
| Lysocline | Lysocline |
| Lysogénie | Lysogenic cycle |
| Lysosome | Lysosome |
| Lyss | Lyss |
| Lyssach | Lyssach |
| Lystrosaurus | Lystrosaurus |
| Lyta Alexander | Lyta Alexander |
| Lythraceae | Lythraceae |
| Lythrum | Lythrum |
| Lytton | Lytton |
| Lyubov Gurina | Lyubov Gurina |
| Lyudmila Blonska | Lyudmila Blonska |
| Lyudmila Bragina | Lyudmila Bragina |
| Lyudmila Georgievna Karachkina | Lyudmila Georgievna Karachkina |
| Lyudmila Kolchanova | Lyudmila Kolchanova |
| Lyudmila Kondratyeva | Lyudmila Kondratyeva |
| Lyudmila Smirnova | Lyudmila Smirnova |
| LZ | LZ |
| LZMA | Lempel-Ziv-Markov chain algorithm |
| là | there |
