| recto | recto |
| rector | curato |
| Rectorville | Rectorville |
| rectory | casa del pastore |
| rectum | retto |
| recumbency | giacere |
| recumbent | supino |
| recuperate | essere in convalescenza |
| recuperate losses from | ottenere un risarcimento da |
| recuperating | guarigione |
| Recuperating Castro shown in Cuban media | Foto della convalescenza di Castro mostrate dai media cubani |
| recuperation | guarigione |
| recuperative | fertilizzante |
| recur | ricorrere |
| recurrence | replica |
| Recurrence relation | Relazione di ricorrenza |
| recurrent | ricorrente |
| Recurrent nova | Novae ricorrenti |
| Recurring characters in Asterix | Asterix il gallico |
| Recursion | Algoritmo ricorsivo |
| Recursion theory | Computabilità |
| Recursive language | Linguaggio ricorsivo |
| Recursively enumerable language | Linguaggio ricorsivamente enumerabile |
| Recurvirostridae | Recurvirostra avosetta |
| recusant | dissidente |
| recyclability | riciclabilità |
| recyclable plastic | plastica riciclabile |
| recycle | riciclare |
| recycled material | materiale riciclato |
| recycled paper | carta riciclata |
| recycler | riciclatore |
| recycling | riciclaggio |
| recycling management and waste law | legge sul riciclaggio e sui rifiuti |
| recycling potential | potenziale del riciclaggio |
| recycling ratio | percentuale di riciclaggio |
| red | rosso |
| red admiral | atalanta |
| Red algae | Rhodophyta |
| Red Allen | Red Allen |
| Red and Anarchist Skinheads | Red and Anarchist Skin Heads |
| Red Army | Armata Rossa |
| Red Army Faction | Rote Armee Fraktion |
| Red bean paste | Anko |
| Red Beard | Barbarossa |
| red beet | barbabietola |
| Red blood | Forza |
| red blood cell | globulo rosso |
| Red Book | Red Book |
| Red Brigades | Brigate Rosse |
| Red Brocket | Mazama americana |
| Red Bull | Red Bull |
| Red Bull New York | New York Red Bulls |
| Red Bull Racing | Red Bull Racing |
| Red Buttons | Red Buttons |
| Red Cloud | Nuvola Rossa |
| red corpuscle | globulo rosso |
| Red Crescent | Croce Rossa e Mezzaluna Rossa Internazionale |
| Red Cross | Croce Rossa |
| red currant | ribes |
| Red deadnettle | Lamium purpureum |
| red deer | cervo nobile |
| Red Desert | Deserto rosso |
| Red dot sight | Red dot |
| Red Dragon | Red Dragon |
| Red dwarf | Nana rossa |
| Red dwarf flare star | Stelle nane rosse a brillamenti |
| Red Eye | Red Eye |
| Red eye tetra | Moenkhausia sanctaefilomenae |
| Red Forest Duiker | Cephalophus natalensis |
| Red Fort | Forte rosso di Agra |
| Red Fox | Vulpes vulpes |
| Red Gazelle | Gazella rufina |
| Red giant | Gigante rossa |
| Red Guards | Guardie Rosse |
| Red Guy | Il Rosso |
| Red hair | Rutilismo |
| Red Harvest | Piombo e sangue |
| Red head | Citrus reticulata |
| Red Hot Chili Peppers | Red Hot Chili Peppers |
| Red Hot Chili Peppers discography | Discografia dei Red Hot Chili Peppers |
| Red Indian | Indiano |
| Red inverted triangle | Triangolo rosso |
| Red Junglefowl | Gallus gallus |
| red kite | nibbio reale |
| Red Knight | Cavaliere Rosso |
| Red Krayola | Red Crayola |
| red light | semaforo rosso |
| Red lionfish | Pterois volitans |
| red meat | carne rossa |
| Red mercury | Mercurio rosso |
| red mullet | triglia |
| Red ochre | Ocra rossa |
| Red of dawn | Aurora |
| Red Panda | Ailurus fulgens |
| red pepper | paprica |
| Red Planet | Pianeta rosso |
| Red rain in Kerala | Pioggia rossa in Kerala |
| Red Riding Hood | Cappuccetto Rosso |
| Red River | Fiume Rosso |
| Red Ruthenia | Rutenia Rossa |
| Red Scorpion | Scorpione rosso |
| Red Screen of Death | Blue Screen of Death |
| Red Sea | Mar Rosso |
| Red Sea Governorate | Governatorato del Mar Rosso |
| Red seal ships | Nave shuinsen |
| Red Shoveler | Anas platalea |
| Red Skies of Montana | Duello nella foresta |
| Red Skull | Teschio Rosso |
| Red sky | Aurora |
| Red Slender Loris | Loris tardigradus |
| Red Slug | Arion rufus |
| Red Sonja | Yado |
| Red spot | Rosa |
| Red Square | Piazza Rossa |
| Red star | Stella rossa |
| Red Star Belgrade | Stella Rossa Belgrado |
| Red Storm Rising | Uragano rosso |
| red table wine | vino rosso da tavola |
| red tape | cavilli burocratici |
| Red telephone | Hotline |
| Red Terror | Terrore rosso |
| red tide | marea rossa |
| Red Week | Settimana Rossa |
| red wine | vino rosso |
| Red Wizard | Mago Rosso |
| Red-and-green Macaw | Ara chloroptera |
| Red-bellied piranha | Pygocentrus nattereri |
| Red-billed chough | Pyrrhocorax pyrrhocorax |
| Red-black tree | Albero rosso-nero |
| red-blooded | vigoroso |
| Red-crackede bolete | Boletus chrysenteron |
| Red-crowned Crane | Grus japonensis |
| Red-deer | Cervus elaphus |
| Red-eared slider | Trachemys scripta elegans |
| Red-eye effect | Effetto occhi rossi |
| red-eyed | dagli occhi rossi |
| Red-figure pottery | Ceramica a figure rosse |
| Red-flanked Duiker | Cephalophus rufilatus |
| Red-footed tortoise | Geochelone carbonaria |
| Red-fronted Gazelle | Gazella rufifrons |
| Red-fronted Serin | Serinus pusillus |
| red-haired | rosso |
| red-handed | sul fatto |
| Red-headed Vulture | Sarcogyps calvus |
| red-hot | rovente |
| red-light district | quartiere a luci rosse |
| Red-logged partridge | Alectoris rufa |
| Red-necked Falcon | Falco chicquera |
| Red-rumped Parrot | Psephotus haematonotus |
| Red-rumped Swallow | Hirundo daurica |
| Red-shanked Douc | Pygathrix nemaeus |
| Red-shouldered Macaw | Diopsittaca nobilis |
| Red-tailed Monkey | Cercopithecus ascanius |
| Red-tape | Burocrazia |
| Red-throated Diver | Gavia stellata |
| Red-winged Tinamou | Rhynchotus rufescens |
| Reda Mansour | Reda Mansour |
| redact | pubblicare |
| Redange | Cantone di Redange |
