| red lily | Schalen-Lilie |
| red lily beetle | Lilienhähnchen |
| Red Line | Deathline |
| Red Line 7000 | Rote Linie 7000 |
| Red lionfish | Pazifischer Rotfeuerfisch |
| Red Lips | Der Wolf - Horror pervers |
| red lipstick | roter Lippenstift |
| red liquor | Rotbeize |
| red liquorice | rote Lakritze |
| red loam | Rotlehm |
| red locust | Rote Wanderheuschrecke |
| red lory | Rotlori |
| red lungwort | Rotes Lungenkraut |
| Red Main | Roter Main |
| red man syndrome | Dermatitis exfoliativa |
| red maple | Rot-Ahorn |
| red marble with brown patches | rotbraun gefleckter Marmor |
| red margin | Lippenrot |
| red margin of lip | Lippenrot |
| red margin of lipp | Lippenrot |
| red margin of the lip | Lippenrot |
| red martagon of Constantinople | Chalzedonische Lilie |
| red meat | dunkles Fleisch |
| red medlar | Teufelszwirn |
| red mercuric sulfide | Zinnoberrot |
| Red mercury | Rotes Quecksilber |
| Red Message | Das China-Komplott |
| red metal | Rotguss |
| Red Monarch | Der rote Monarch |
| red mordant | Rotbeize |
| Red Morning | Roter Morgen |
| red morning glory | Scharlachrote Prunkwinde |
| Red Mosque | Rote Moschee |
| Red Mountain | Die Hölle der roten Berge |
| red mud | Rotschlamm |
| red mullet | Meerbarbe |
| red mullets | Meerbarben |
| red munia | Tigerfink |
| red neon tetra | Roter Neon |
| red nucleus | Nucleus ruber |
| red nun buoy | rote Spierenboje |
| red oak | Roteiche |
| Red ochre | Ocker |
| Red of dawn | Aurora |
| red oil | Oleinsäure |
| red onion | rote Zwiebel |
| red orange | rotorange |
| Red Orc's Rage | Der Zorn des Roten Lords |
| Red Orchestra | Rote Kapelle |
| Red Orchids | Rote Orchideen |
| Red Orm | Die Abenteuer des Röde Orm |
| red out | vorgelesen |
| red oxide of iron | Roteisenstein |
| red oxide of zinc | Zinkit |
